diff --git a/examples/discover_customization_examples/public/plugin.tsx b/examples/discover_customization_examples/public/plugin.tsx
index c13c29782d89b..bdcb0b1fe19a6 100644
--- a/examples/discover_customization_examples/public/plugin.tsx
+++ b/examples/discover_customization_examples/public/plugin.tsx
@@ -7,7 +7,6 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
-import type { IconType } from '@elastic/eui';
 import { EuiButton, EuiContextMenu, EuiFlexItem, EuiPopover } from '@elastic/eui';
 import type { CoreSetup, CoreStart, Plugin } from '@kbn/core/public';
 import type { DeveloperExamplesSetup } from '@kbn/developer-examples-plugin/public';
@@ -74,7 +73,6 @@ export class DiscoverCustomizationExamplesPlugin implements Plugin {
                       }}
                       scopedHistory={appMountParams.history}
                       customizationCallbacks={[this.customizationCallback]}
-                      customizationContext={{ displayMode: 'standalone' }}
                     />
                   </Route>
                 </Routes>
@@ -102,18 +100,8 @@ export class DiscoverCustomizationExamplesPlugin implements Plugin {
     });
   }
 
-  start(core: CoreStart, plugins: DiscoverCustomizationExamplesStartPlugins) {
+  start(_: CoreStart, plugins: DiscoverCustomizationExamplesStartPlugins) {
     this.customizationCallback = ({ customizations, stateContainer }) => {
-      customizations.set({
-        id: 'top_nav',
-        defaultMenu: {
-          newItem: { disabled: true },
-          openItem: { disabled: true },
-          alertsItem: { disabled: true },
-          inspectItem: { disabled: true },
-        },
-      });
-
       customizations.set({
         id: 'search_bar',
         CustomDataViewPicker: () => {
@@ -280,28 +268,6 @@ export class DiscoverCustomizationExamplesPlugin implements Plugin {
         },
       });
 
-      customizations.set({
-        id: 'flyout',
-        size: 650,
-        title: 'Example custom flyout',
-        actions: {
-          getActionItems: () =>
-            Array.from({ length: 5 }, (_, i) => {
-              const index = i + 1;
-              return {
-                id: `action-item-${index}`,
-                enabled: true,
-                label: `Action ${index}`,
-                iconType: ['faceHappy', 'faceNeutral', 'faceSad', 'infinity', 'bell'].at(
-                  i
-                ) as IconType,
-                dataTestSubj: `customActionItem${index}`,
-                onClick: () => alert(index),
-              };
-            }),
-        },
-      });
-
       return () => {
         // eslint-disable-next-line no-console
         console.log('Cleaning up Logs explorer customizations');
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.test.tsx b/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.test.tsx
index d2fb4d5e4e150..7cdea36ac36e2 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.test.tsx
+++ b/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.test.tsx
@@ -21,7 +21,6 @@ import { buildDataTableRecord } from '@kbn/discover-utils';
 import type { EsHitRecord } from '@kbn/discover-utils/types';
 import { getDiscoverStateMock } from '../../../../__mocks__/discover_state.mock';
 import type { DiscoverAppState } from '../../state_management/redux';
-import type { DiscoverCustomization } from '../../../../customizations';
 import { createCustomizationService } from '../../../../customizations/customization_service';
 import { DiscoverGrid } from '../../../../components/discover_grid';
 import { createDataViewDataSource } from '../../../../../common/data_sources';
@@ -152,36 +151,13 @@ describe('Discover documents layout', () => {
     expect(container.getCurrentTab().appState.grid?.columns?.someField.width).toEqual(206);
   });
 
-  test('should render customisations', async () => {
-    const customization: DiscoverCustomization = {
-      id: 'data_table',
-      logsEnabled: true,
-      rowAdditionalLeadingControls: [],
-    };
-
-    customisationService.set(customization);
-    const component = await mountComponent(FetchStatus.COMPLETE, esHitsMock);
-    const discoverGridComponent = component.find(DiscoverGrid);
-    expect(discoverGridComponent.exists()).toBeTruthy();
-
-    expect(discoverGridComponent.prop('rowAdditionalLeadingControls')).toBe(
-      customization.rowAdditionalLeadingControls
-    );
-    expect(discoverGridComponent.prop('externalCustomRenderers')).toBeDefined();
-  });
-
   describe('context awareness', () => {
     it('should pass cell renderers from profile', async () => {
-      customisationService.set({
-        id: 'data_table',
-        logsEnabled: true,
-      });
       await discoverServiceMock.profilesManager.resolveRootProfile({ solutionNavId: 'test' });
       const component = await mountComponent(FetchStatus.COMPLETE, esHitsMock);
       const discoverGridComponent = component.find(DiscoverGrid);
       expect(discoverGridComponent.exists()).toBeTruthy();
       expect(Object.keys(discoverGridComponent.prop('externalCustomRenderers')!)).toEqual([
-        '_source',
         'rootProfile',
       ]);
     });
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.tsx b/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.tsx
index 1f8d7cdf0ba93..3a30230d74166 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.tsx
+++ b/src/platform/plugins/shared/discover/public/application/main/components/layout/discover_documents.tsx
@@ -66,9 +66,7 @@ import {
 } from '../../../../utils/get_allowed_sample_size';
 import { useFetchMoreRecords } from './use_fetch_more_records';
 import { SelectedVSAvailableCallout } from './selected_vs_available_callout';
-import { useDiscoverCustomization } from '../../../../customizations';
 import { onResizeGridColumn } from '../../../../utils/on_resize_grid_column';
-import { useContextualGridCustomisations } from '../../hooks/grid_customisations';
 import { useIsEsqlMode } from '../../hooks/use_is_esql_mode';
 import type {
   CellRenderersExtensionParams,
@@ -457,14 +455,11 @@ function DiscoverDocumentsComponent({
     [onAddFilter, dataView, cellRendererDensity, cellRendererRowHeight]
   );
 
-  const { rowAdditionalLeadingControls } = useDiscoverCustomization('data_table') || {};
-  const { customCellRenderer } = useContextualGridCustomisations(cellRendererParams) || {};
-
   const getCellRenderersAccessor = useProfileAccessor('getCellRenderers');
   const cellRenderers = useMemo(() => {
-    const getCellRenderers = getCellRenderersAccessor(() => customCellRenderer ?? {});
+    const getCellRenderers = getCellRenderersAccessor(() => ({}));
     return getCellRenderers(cellRendererParams);
-  }, [cellRendererParams, customCellRenderer, getCellRenderersAccessor]);
+  }, [cellRendererParams, getCellRenderersAccessor]);
 
   const documents = useObservable(stateContainer.dataState.data$.documents$);
 
@@ -580,7 +575,6 @@ function DiscoverDocumentsComponent({
             totalHits={totalHits}
             onFetchMoreRecords={onFetchMoreRecords}
             externalCustomRenderers={cellRenderers}
-            rowAdditionalLeadingControls={rowAdditionalLeadingControls}
             dataGridDensityState={density}
             onUpdateDataGridDensity={onUpdateDensity}
             onUpdateESQLQuery={onUpdateESQLQuery}
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/sidebar/discover_sidebar_responsive.test.tsx b/src/platform/plugins/shared/discover/public/application/main/components/sidebar/discover_sidebar_responsive.test.tsx
index 27ee96ab532b2..a7bbe2ef1d64d 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/sidebar/discover_sidebar_responsive.test.tsx
+++ b/src/platform/plugins/shared/discover/public/application/main/components/sidebar/discover_sidebar_responsive.test.tsx
@@ -32,7 +32,7 @@ import type { AggregateQuery, Query } from '@kbn/es-query';
 import { buildDataTableRecord } from '@kbn/discover-utils';
 import type { DataTableRecord } from '@kbn/discover-utils/types';
 import type { DiscoverCustomizationId } from '../../../../customizations/customization_service';
-import type { FieldListCustomization, SearchBarCustomization } from '../../../../customizations';
+import type { SearchBarCustomization } from '../../../../customizations';
 import { DiscoverTestProvider } from '../../../../__mocks__/test_provider';
 import type { DataView } from '@kbn/data-views-plugin/common';
 import type { UnifiedFieldListRestorableState } from '@kbn/unified-field-list';
@@ -47,11 +47,6 @@ const mockSearchBarCustomization: SearchBarCustomization = {
     .mockName('CustomDataViewPickerMock'),
 };
 
-const mockFieldListCustomisation: FieldListCustomization = {
-  id: 'field_list',
-  logsFieldsEnabled: true,
-};
-
 let mockUseCustomizations = false;
 
 jest.mock('../../../../customizations', () => ({
@@ -64,8 +59,6 @@ jest.mock('../../../../customizations', () => ({
     switch (id) {
       case 'search_bar':
         return mockSearchBarCustomization;
-      case 'field_list':
-        return mockFieldListCustomisation;
       default:
         throw new Error(`Unknown customization id: ${id}`);
     }
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/discover_topnav.test.tsx b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/discover_topnav.test.tsx
index bb29f3cb6df3d..2909e4647edae 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/discover_topnav.test.tsx
+++ b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/discover_topnav.test.tsx
@@ -14,10 +14,9 @@ import { mountWithIntl } from '@kbn/test-jest-helpers';
 import { dataViewMock } from '@kbn/discover-utils/src/__mocks__';
 import type { DiscoverTopNavProps } from './discover_topnav';
 import { DiscoverTopNav } from './discover_topnav';
-import { sharePluginMock } from '@kbn/share-plugin/public/mocks';
 import { discoverServiceMock as mockDiscoverService } from '../../../../__mocks__/services';
 import { getDiscoverStateMock } from '../../../../__mocks__/discover_state.mock';
-import type { SearchBarCustomization, TopNavCustomization } from '../../../../customizations';
+import type { SearchBarCustomization } from '../../../../customizations';
 import type { DiscoverCustomizationId } from '../../../../customizations/customization_service';
 import { useDiscoverCustomization } from '../../../../customizations';
 import { useKibana } from '@kbn/kibana-react-plugin/public';
@@ -34,10 +33,6 @@ jest.mock('@kbn/kibana-react-plugin/public', () => ({
 const MockCustomSearchBar: typeof mockDiscoverService.navigation.ui.AggregateQueryTopNavMenu =
   () => <div data-test-subj="custom-search-bar" />;
 
-const mockTopNavCustomization: TopNavCustomization = {
-  id: 'top_nav',
-};
-
 const mockSearchBarCustomization: SearchBarCustomization = {
   id: 'search_bar',
   CustomDataViewPicker: jest.fn(() => <div data-test-subj="custom-data-view-picker" />),
@@ -113,7 +108,6 @@ const getTestComponent = (props: DiscoverTopNavProps) =>
 
 describe('Discover topnav component', () => {
   beforeEach(() => {
-    mockTopNavCustomization.defaultMenu = undefined;
     mockUseCustomizations = false;
     capturedTopNavMenu = undefined;
     jest.clearAllMocks();
@@ -124,8 +118,6 @@ describe('Discover topnav component', () => {
       }
 
       switch (id) {
-        case 'top_nav':
-          return mockTopNavCustomization;
         case 'search_bar':
           return mockSearchBarCustomization;
         default:
@@ -160,83 +152,6 @@ describe('Discover topnav component', () => {
     expect(capturedTopNavMenu?.primaryActionItem).toBeUndefined();
   });
 
-  describe('top nav customization', () => {
-    it('should allow disabling default menu items', async () => {
-      mockUseCustomizations = true;
-      mockTopNavCustomization.defaultMenu = {
-        newItem: { disabled: true },
-        openItem: { disabled: true },
-        shareItem: { disabled: true },
-        alertsItem: { disabled: true },
-        inspectItem: { disabled: true },
-        saveItem: { disabled: true },
-      };
-      const props = getProps();
-      await act(async () => {
-        getTestComponent(props);
-      });
-
-      const itemIds = capturedTopNavMenu?.items?.map((item) => item.id) || [];
-      expect(itemIds).toEqual([]);
-    });
-
-    describe('share service available', () => {
-      let availableIntegrationsSpy: jest.SpyInstance;
-
-      beforeAll(() => {
-        mockDiscoverService.share = sharePluginMock.createStartContract();
-      });
-
-      afterAll(() => {
-        mockDiscoverService.share = undefined;
-      });
-
-      beforeEach(() => {
-        (availableIntegrationsSpy = jest.spyOn(
-          mockDiscoverService.share!,
-          'availableIntegrations'
-        )).mockImplementation(() => []);
-      });
-
-      it('will include share menu item if the share service is available', async () => {
-        const props = getProps();
-        await act(async () => {
-          getTestComponent(props);
-        });
-
-        const itemIds = capturedTopNavMenu?.items?.map((item) => item.id) || [];
-        expect(itemIds).toEqual(['inspect', 'new', 'open', 'share']);
-        expect(capturedTopNavMenu?.primaryActionItem?.id).toBe('save');
-      });
-
-      it('will include export menu item if there are export integrations available', async () => {
-        availableIntegrationsSpy.mockImplementation((_objectType, groupId) => {
-          if (groupId === 'export') {
-            return [
-              {
-                id: 'export',
-                shareType: 'integration',
-                groupId: 'export',
-                config: () => Promise.resolve({}),
-              },
-            ];
-          }
-
-          return [];
-        });
-
-        const props = getProps();
-        await act(async () => {
-          getTestComponent(props);
-        });
-
-        const itemIds = capturedTopNavMenu?.items?.map((item) => item.id) || [];
-        expect(itemIds).toEqual(['inspect', 'new', 'open', 'export', 'share']);
-        expect(capturedTopNavMenu?.primaryActionItem?.id).toBe('save');
-      });
-    });
-  });
-
   describe('search bar customization', () => {
     it('should render custom Search Bar', async () => {
       (useDiscoverCustomization as jest.Mock).mockImplementation((id: DiscoverCustomizationId) => {
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_discover_topnav.ts b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_discover_topnav.ts
index f43ed87feb7bf..4bd967a14b3af 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_discover_topnav.ts
+++ b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_discover_topnav.ts
@@ -10,7 +10,6 @@
 import { useMemo } from 'react';
 import type { DiscoverSession } from '@kbn/saved-search-plugin/common';
 import { useIsWithinBreakpoints } from '@elastic/eui';
-import { useDiscoverCustomization } from '../../../../customizations';
 import { useDiscoverServices } from '../../../../hooks/use_discover_services';
 import { useInspector } from '../../hooks/use_inspector';
 import { useIsEsqlMode } from '../../hooks/use_is_esql_mode';
@@ -32,7 +31,6 @@ export const useDiscoverTopNav = ({
   persistedDiscoverSession: DiscoverSession | undefined;
 }) => {
   const services = useDiscoverServices();
-  const topNavCustomization = useDiscoverCustomization('top_nav');
   const hasUnsavedChanges = useInternalStateSelector((state) => state.hasUnsavedChanges);
   const isMobile = useIsWithinBreakpoints(['xs']);
 
@@ -63,7 +61,6 @@ export const useDiscoverTopNav = ({
     hasUnsavedChanges,
     isEsqlMode,
     adHocDataViews,
-    topNavCustomization,
     hasShareIntegration,
     persistedDiscoverSession,
   });
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.test.tsx b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.test.tsx
index 4a533aa0e3153..f319a850f39d8 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.test.tsx
+++ b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.test.tsx
@@ -74,7 +74,6 @@ describe('useTopNavLinks', () => {
           hasUnsavedChanges: false,
           isEsqlMode: false,
           adHocDataViews: [],
-          topNavCustomization: undefined,
           hasShareIntegration,
           persistedDiscoverSession: undefined,
           ...hookAttrs,
@@ -173,7 +172,6 @@ describe('useTopNavLinks', () => {
             hasUnsavedChanges: false,
             isEsqlMode: false,
             adHocDataViews: [],
-            topNavCustomization: undefined,
             hasShareIntegration: true,
             persistedDiscoverSession: undefined,
           }),
diff --git a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.tsx b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.tsx
index 7119d2fa07172..dc74310bfdc63 100644
--- a/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.tsx
+++ b/src/platform/plugins/shared/discover/public/application/main/components/top_nav/use_top_nav_links.tsx
@@ -36,7 +36,6 @@ import {
   getBackgroundSearchFlyout,
   enhanceAppMenuItemWithRunAction,
 } from './app_menu_actions';
-import type { TopNavCustomization } from '../../../../customizations';
 import { useProfileAccessor } from '../../../../context_awareness';
 import {
   internalStateActions,
@@ -60,7 +59,6 @@ export const useTopNavLinks = ({
   hasUnsavedChanges,
   isEsqlMode,
   adHocDataViews,
-  topNavCustomization,
   hasShareIntegration,
   persistedDiscoverSession,
 }: {
@@ -71,7 +69,6 @@ export const useTopNavLinks = ({
   hasUnsavedChanges: boolean;
   isEsqlMode: boolean;
   adHocDataViews: DataView[];
-  topNavCustomization: TopNavCustomization | undefined;
   hasShareIntegration: boolean;
   persistedDiscoverSession: DiscoverSession | undefined;
 }): AppMenuConfig => {
@@ -111,20 +108,13 @@ export const useTopNavLinks = ({
     [isEsqlMode, dataView, adHocDataViews, dispatch, authorizedRuleTypes]
   );
 
-  const defaultMenu = topNavCustomization?.defaultMenu;
-
   const appMenuItems: DiscoverAppMenuItemType[] = useMemo(() => {
     const items: DiscoverAppMenuItemType[] = [];
-    if (!defaultMenu?.inspectItem?.disabled) {
-      const inspectAppMenuItem = getInspectAppMenuItem({ onOpenInspector });
-      items.push(inspectAppMenuItem);
-    }
 
-    if (
-      services.triggersActionsUi &&
-      !defaultMenu?.alertsItem?.disabled &&
-      discoverParams.authorizedRuleTypeIds.length
-    ) {
+    const inspectAppMenuItem = getInspectAppMenuItem({ onOpenInspector });
+    items.push(inspectAppMenuItem);
+
+    if (services.triggersActionsUi && discoverParams.authorizedRuleTypeIds.length) {
       const alertsAppMenuItem = getAlertsAppMenuItem({
         discoverParams,
         services,
@@ -153,7 +143,7 @@ export const useTopNavLinks = ({
       items.push(backgroundSearchFlyoutMenuItem);
     }
 
-    if (!services.embeddableEditor.isEmbeddedEditor() && !defaultMenu?.newItem?.disabled) {
+    if (!services.embeddableEditor.isEmbeddedEditor()) {
       const defaultEsqlState: Pick<DiscoverAppState, 'query'> | undefined =
         isEsqlMode && currentDataView.type === ESQL_TYPE
           ? { query: { esql: getInitialESQLQuery(currentDataView, true) } }
@@ -177,7 +167,7 @@ export const useTopNavLinks = ({
       items.push(newSearchMenuItem);
     }
 
-    if (!services.embeddableEditor.isEmbeddedEditor() && !defaultMenu?.openItem?.disabled) {
+    if (!services.embeddableEditor.isEmbeddedEditor()) {
       const openSearchMenuItem = getOpenSearchAppMenuItem({
         onOpenSavedSearch: (discoverSessionId) =>
           dispatch(internalStateActions.openDiscoverSession({ discoverSessionId })),
@@ -185,24 +175,21 @@ export const useTopNavLinks = ({
       items.push(openSearchMenuItem);
     }
 
-    if (!defaultMenu?.shareItem?.disabled) {
-      const shareAppMenuItem = getShareAppMenuItem({
-        discoverParams,
-        services,
-        stateContainer: state,
-        hasIntegrations: hasShareIntegration,
-        hasUnsavedChanges,
-        currentTab,
-        persistedDiscoverSession,
-        totalHitsState,
-        intl,
-      });
-      items.push(...shareAppMenuItem);
-    }
+    const shareAppMenuItem = getShareAppMenuItem({
+      discoverParams,
+      services,
+      stateContainer: state,
+      hasIntegrations: hasShareIntegration,
+      hasUnsavedChanges,
+      currentTab,
+      persistedDiscoverSession,
+      totalHitsState,
+      intl,
+    });
+    items.push(...shareAppMenuItem);
 
     return items;
   }, [
-    defaultMenu,
     services,
     discoverParams,
     appId,
@@ -252,7 +239,7 @@ export const useTopNavLinks = ({
       });
     }
 
-    if (services.capabilities.discover_v2.save && !defaultMenu?.saveItem?.disabled) {
+    if (services.capabilities.discover_v2.save) {
       const isEmbeddedEditor = services.embeddableEditor.isEmbeddedEditor();
 
       newAppMenuRegistry.setPrimaryActionItem({
@@ -362,7 +349,6 @@ export const useTopNavLinks = ({
     dataView,
     dispatch,
     state,
-    defaultMenu?.saveItem?.disabled,
     hasUnsavedChanges,
     transitionFromDataViewToESQL,
   ]);
diff --git a/src/platform/plugins/shared/discover/public/application/main/hooks/grid_customisations/index.ts b/src/platform/plugins/shared/discover/public/application/main/hooks/grid_customisations/index.ts
deleted file mode 100644
index 97b3f07478423..0000000000000
--- a/src/platform/plugins/shared/discover/public/application/main/hooks/grid_customisations/index.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the "Elastic License
- * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
- * Public License v 1"; you may not use this file except in compliance with, at
- * your election, the "Elastic License 2.0", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-import { useMemo } from 'react';
-import { useDiscoverCustomization } from '../../../../customizations';
-import type { DataGridColumnsDeps } from './logs';
-import { getDataGridColumnsConfiguration } from './logs';
-
-export * from './logs';
-
-type ContextualGridCustomizationParams = DataGridColumnsDeps;
-
-export const useContextualGridCustomisations = (params: ContextualGridCustomizationParams) => {
-  // TODO / NOTE: This will eventually rely on Discover's context resolution to determine which fields
-  // are returned based on the data type.
-  const isLogsContext = useDiscoverCustomization('data_table')?.logsEnabled;
-
-  const virtualColumnsConfiguration = useMemo(() => {
-    if (!isLogsContext) return null;
-
-    return getDataGridColumnsConfiguration(params);
-  }, [isLogsContext, params]);
-
-  return virtualColumnsConfiguration;
-};
diff --git a/src/platform/plugins/shared/discover/public/application/main/hooks/grid_customisations/logs.tsx b/src/platform/plugins/shared/discover/public/application/main/hooks/grid_customisations/logs.tsx
deleted file mode 100644
index c3c28340577f2..0000000000000
--- a/src/platform/plugins/shared/discover/public/application/main/hooks/grid_customisations/logs.tsx
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the "Elastic License
- * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
- * Public License v 1"; you may not use this file except in compliance with, at
- * your election, the "Elastic License 2.0", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-import { SOURCE_COLUMN } from '@kbn/unified-data-table';
-import type { SummaryColumnGetterDeps } from '../../../../components/data_types/logs/summary_column';
-import { getSummaryColumn } from '../../../../components/data_types/logs/summary_column';
-
-export type DataGridColumnsDeps = CustomCellRendererDeps;
-
-export const getDataGridColumnsConfiguration = (params: DataGridColumnsDeps) => {
-  return {
-    customCellRenderer: createCustomCellRenderer(params),
-  };
-};
-
-type CustomCellRendererDeps = SummaryColumnGetterDeps;
-
-export const createCustomCellRenderer = (params: CustomCellRendererDeps) => {
-  return {
-    [SOURCE_COLUMN]: getSummaryColumn(params),
-  };
-};
diff --git a/src/platform/plugins/shared/discover/public/components/discover_container/discover_container.tsx b/src/platform/plugins/shared/discover/public/components/discover_container/discover_container.tsx
index 4005d07f560bc..7e6859c0cacb9 100644
--- a/src/platform/plugins/shared/discover/public/components/discover_container/discover_container.tsx
+++ b/src/platform/plugins/shared/discover/public/components/discover_container/discover_container.tsx
@@ -30,7 +30,6 @@ export interface DiscoverContainerInternalProps {
   getDiscoverServices: () => Promise<DiscoverServices>;
   scopedHistory: ScopedHistory;
   customizationCallbacks: CustomizationCallback[];
-  customizationContext?: DiscoverCustomizationContext;
   stateStorageContainer?: IKbnUrlStateStorage;
   isLoading?: boolean;
 }
@@ -46,13 +45,12 @@ const discoverContainerWrapperCss = css`
   }
 `;
 
-const defaultCustomizationContext: DiscoverCustomizationContext = { displayMode: 'embedded' };
+const customizationContext: DiscoverCustomizationContext = { displayMode: 'embedded' };
 
 export const DiscoverContainerInternal = ({
   overrideServices,
   scopedHistory,
   customizationCallbacks,
-  customizationContext = defaultCustomizationContext,
   getDiscoverServices,
   stateStorageContainer,
   isLoading = false,
diff --git a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx
index 43f766e3e9e02..0074b4f806452 100644
--- a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx
+++ b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx
@@ -7,8 +7,8 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
+import type { ComponentType } from 'react';
 import React from 'react';
-import { EuiButtonIcon, EuiContextMenuItem, EuiPopover } from '@elastic/eui';
 import { findTestSubject } from '@elastic/eui/lib/test';
 import { mountWithIntl } from '@kbn/test-jest-helpers';
 import type { Query, AggregateQuery } from '@kbn/es-query';
@@ -24,35 +24,23 @@ import { act } from 'react-dom/test-utils';
 import type { ReactWrapper } from 'enzyme';
 import { setUnifiedDocViewerServices } from '@kbn/unified-doc-viewer-plugin/public/plugin';
 import { mockUnifiedDocViewerServices } from '@kbn/unified-doc-viewer-plugin/public/__mocks__';
-import type { FlyoutCustomization } from '../../customizations';
-import { useDiscoverCustomization } from '../../customizations';
 import { discoverServiceMock } from '../../__mocks__/services';
 import { DiscoverTestProvider } from '../../__mocks__/test_provider';
+import type { UnifiedDocViewerFlyoutProps } from '@kbn/unified-doc-viewer-plugin/public';
 
-const mockFlyoutCustomization: FlyoutCustomization = {
-  id: 'flyout',
-  actions: {},
-};
-
-jest.mock('../../customizations', () => ({
-  ...jest.requireActual('../../customizations'),
-  useDiscoverCustomization: jest.fn(),
-}));
+let mockFlyoutCustomBody: ComponentType | undefined;
 
-let mockBreakpointSize: string | null = null;
-
-jest.mock('@elastic/eui', () => {
-  const original = jest.requireActual('@elastic/eui');
+jest.mock('@kbn/unified-doc-viewer-plugin/public', () => {
+  const actual = jest.requireActual('@kbn/unified-doc-viewer-plugin/public');
+  const OriginalFlyout = actual.UnifiedDocViewerFlyout;
   return {
-    ...original,
-    useIsWithinBreakpoints: jest.fn((breakpoints: string[]) => {
-      if (mockBreakpointSize && breakpoints.includes(mockBreakpointSize)) {
-        return true;
-      }
-
-      return original.useIsWithinBreakpoints(breakpoints);
-    }),
-    useResizeObserver: jest.fn(() => ({ width: 1000, height: 1000 })),
+    ...actual,
+    UnifiedDocViewerFlyout: (props: UnifiedDocViewerFlyoutProps) => (
+      <OriginalFlyout
+        {...props}
+        {...(mockFlyoutCustomBody ? { FlyoutCustomBody: mockFlyoutCustomBody } : {})}
+      />
+    ),
   };
 });
 
@@ -125,12 +113,8 @@ describe('Discover flyout', function () {
   };
 
   beforeEach(() => {
-    mockFlyoutCustomization.actions.defaultActions = undefined;
-    mockFlyoutCustomization.Content = undefined;
-    mockFlyoutCustomization.title = undefined;
+    mockFlyoutCustomBody = undefined;
     jest.clearAllMocks();
-
-    (useDiscoverCustomization as jest.Mock).mockImplementation(() => mockFlyoutCustomization);
   });
 
   it('should be rendered correctly using an data view without timefield', async () => {
@@ -241,10 +225,7 @@ describe('Discover flyout', function () {
   });
 
   it('should not navigate with arrow keys through documents if an input is in focus', async () => {
-    mockFlyoutCustomization.Content = () => {
-      return <input data-test-subj="flyoutCustomInput" />;
-    };
-
+    mockFlyoutCustomBody = () => <input data-test-subj="flyoutCustomInput" />;
     const { component, props } = await mountComponent({});
     findTestSubject(component, 'flyoutCustomInput').simulate('keydown', {
       key: 'ArrowRight',
@@ -275,261 +256,47 @@ describe('Discover flyout', function () {
     );
   });
 
-  describe('with applied customizations', () => {
-    describe('when title is customized', () => {
-      it('should pass the custom title to EuiFlyout flyoutMenuProps', async () => {
-        const customTitle = 'Custom flyout title';
-        mockFlyoutCustomization.title = customTitle;
-
-        const { component } = await mountComponent({});
-
-        // TODO: check title text content directly after migrating the test to RTL https://github.com/elastic/kibana/issues/222939
-        const flyout = component.find('EuiFlyout');
-        const flyoutMenuProps = flyout.prop('flyoutMenuProps');
-        expect(flyoutMenuProps).toEqual(
-          expect.objectContaining({
-            title: customTitle,
-            hideTitle: false,
-          })
-        );
-      });
-    });
-
-    describe('when actions are customized', () => {
-      it('should display actions added by getActionItems', async () => {
-        mockBreakpointSize = 'xl';
-        mockFlyoutCustomization.actions = {
-          getActionItems: jest.fn(() => [
-            {
-              id: 'action-item-1',
-              enabled: true,
-              label: 'Action 1',
-              iconType: 'document',
-              dataTestSubj: 'customActionItem1',
-              onClick: jest.fn(),
-            },
-            {
-              id: 'action-item-2',
-              enabled: true,
-              label: 'Action 2',
-              iconType: 'document',
-              dataTestSubj: 'customActionItem2',
-              onClick: jest.fn(),
-            },
-            {
-              id: 'action-item-3',
-              enabled: false,
-              label: 'Action 3',
-              iconType: 'document',
-              dataTestSubj: 'customActionItem3',
-              onClick: jest.fn(),
-            },
-          ]),
-        };
-
-        const { component } = await mountComponent({});
-
-        const action1 = findTestSubject(component, 'customActionItem1');
-        const action2 = findTestSubject(component, 'customActionItem2');
-
-        expect(action1.text()).toBe('Action 1');
-        expect(action2.text()).toBe('Action 2');
-        expect(findTestSubject(component, 'customActionItem3').exists()).toBe(false);
-        mockBreakpointSize = null;
-      });
-
-      it('should display multiple actions added by getActionItems', async () => {
-        mockFlyoutCustomization.actions = {
-          getActionItems: jest.fn(() =>
-            Array.from({ length: 5 }, (_, i) => ({
-              id: `action-item-${i}`,
-              enabled: true,
-              label: `Action ${i}`,
-              iconType: 'document',
-              dataTestSubj: `customActionItem${i}`,
-              onClick: jest.fn(),
-            }))
-          ),
-        };
-
-        const { component } = await mountComponent({});
-        expect(
-          findTestSubject(component, 'docViewerFlyoutActions')
-            .find(EuiButtonIcon)
-            .map((button) => button.prop('data-test-subj'))
-        ).toEqual([
-          'docTableRowAction',
-          'customActionItem0',
-          'customActionItem1',
-          'docViewerMoreFlyoutActionsButton',
-        ]);
-
-        act(() => {
-          findTestSubject(component, 'docViewerMoreFlyoutActionsButton').simulate('click');
-        });
-
-        component.update();
-
-        expect(
-          component
-            .find(EuiPopover)
-            .find(EuiContextMenuItem)
-            .map((button) => button.prop('data-test-subj'))
-        ).toEqual(['customActionItem2', 'customActionItem3', 'customActionItem4']);
-      });
-
-      it('should display multiple actions added by getActionItems in mobile view', async () => {
-        mockBreakpointSize = 's';
-
-        mockFlyoutCustomization.actions = {
-          getActionItems: jest.fn(() =>
-            Array.from({ length: 3 }, (_, i) => ({
-              id: `action-item-${i}`,
-              enabled: true,
-              label: `Action ${i}`,
-              iconType: 'document',
-              dataTestSubj: `customActionItem${i}`,
-              onClick: jest.fn(),
-            }))
-          ),
-        };
-
-        const { component } = await mountComponent({});
-        expect(findTestSubject(component, 'docViewerFlyoutActions').length).toBe(0);
-
-        act(() => {
-          findTestSubject(component, 'docViewerMobileActionsButton').simulate('click');
-        });
-
-        component.update();
-
-        expect(
-          component
-            .find(EuiPopover)
-            .find(EuiContextMenuItem)
-            .map((button) => button.prop('data-test-subj'))
-        ).toEqual([
-          'docTableRowAction',
-          'customActionItem0',
-          'customActionItem1',
-          'customActionItem2',
-        ]);
-
-        mockBreakpointSize = null;
-      });
-
-      it('should allow disabling default actions', async () => {
-        mockFlyoutCustomization.actions = {
-          defaultActions: {
-            viewSingleDocument: { disabled: true },
-            viewSurroundingDocument: { disabled: true },
-          },
-        };
-
-        const { component } = await mountComponent({});
-
-        const singleDocumentView = findTestSubject(component, 'docTableRowAction');
-        expect(singleDocumentView.length).toBeFalsy();
-      });
-    });
-
-    describe('when content is customized', () => {
-      it('should display the component passed to the Content customization', async () => {
-        mockFlyoutCustomization.Content = () => (
-          <span data-test-subj="flyoutCustomContent">Custom content</span>
-        );
-
-        const { component } = await mountComponent({});
-
-        const customContent = findTestSubject(component, 'flyoutCustomContent');
-
-        expect(customContent.text()).toBe('Custom content');
-      });
-
-      it('should provide a doc property to display details about the current document overview', async () => {
-        mockFlyoutCustomization.Content = ({ doc }) => {
-          return (
-            <span data-test-subj="flyoutCustomContent">{doc.flattened.message as string}</span>
-          );
-        };
-
-        const { component } = await mountComponent({});
-
-        const customContent = findTestSubject(component, 'flyoutCustomContent');
-
-        expect(customContent.text()).toBe('test1');
+  describe('context awareness', () => {
+    it('should render flyout per the defined document profile', async () => {
+      const services = getServices();
+      const hits = [
+        {
+          _index: 'new',
+          _id: '1',
+          _score: 1,
+          _type: '_doc',
+          _source: { date: '2020-20-01T12:12:12.123', message: 'test1', bytes: 20 },
+        },
+        {
+          _index: 'new',
+          _id: '2',
+          _score: 1,
+          _type: '_doc',
+          _source: { date: '2020-20-01T12:12:12.124', name: 'test2', extension: 'jpg' },
+        },
+      ];
+      const scopedProfilesManager = services.profilesManager.createScopedProfilesManager({
+        scopedEbtManager: services.ebtManager.createScopedEBTManager(),
       });
-
-      it('should provide an actions prop collection to optionally update the grid content', async () => {
-        mockFlyoutCustomization.Content = ({ actions }) => (
-          <>
-            <button data-test-subj="addColumn" onClick={() => actions.onAddColumn?.('message')} />
-            <button
-              data-test-subj="removeColumn"
-              onClick={() => actions.onRemoveColumn?.('message')}
-            />
-            <button
-              data-test-subj="addFilter"
-              onClick={() => actions.filter?.('_exists_', 'message', '+')}
-            />
-          </>
-        );
-
-        const { component, props, services } = await mountComponent({});
-
-        findTestSubject(component, 'addColumn').simulate('click');
-        findTestSubject(component, 'removeColumn').simulate('click');
-        findTestSubject(component, 'addFilter').simulate('click');
-
-        expect(props.onAddColumn).toHaveBeenCalled();
-        expect(props.onRemoveColumn).toHaveBeenCalled();
-        expect(services.toastNotifications.addSuccess).toHaveBeenCalledTimes(2);
-        expect(props.onFilter).toHaveBeenCalled();
-      });
-    });
-
-    describe('context awareness', () => {
-      it('should render flyout per the defined document profile', async () => {
-        const services = getServices();
-        const hits = [
-          {
-            _index: 'new',
-            _id: '1',
-            _score: 1,
-            _type: '_doc',
-            _source: { date: '2020-20-01T12:12:12.123', message: 'test1', bytes: 20 },
-          },
-          {
-            _index: 'new',
-            _id: '2',
-            _score: 1,
-            _type: '_doc',
-            _source: { date: '2020-20-01T12:12:12.124', name: 'test2', extension: 'jpg' },
-          },
-        ];
-        const scopedProfilesManager = services.profilesManager.createScopedProfilesManager({
-          scopedEbtManager: services.ebtManager.createScopedEBTManager(),
-        });
-        const records = buildDataTableRecordList({
-          records: hits as EsHitRecord[],
-          dataView: dataViewMock,
-          processRecord: (record) => scopedProfilesManager.resolveDocumentProfile({ record }),
-        });
-        const { component } = await mountComponent({ records, services });
-
-        const content = findTestSubject(component, 'kbnDocViewer');
-        expect(content.text()).toBe('Mock tab');
-
-        // TODO: check title text content directly after migrating the test to RTL https://github.com/elastic/kibana/issues/222939
-        const flyout = component.find('EuiFlyout');
-        const flyoutMenuProps = flyout.prop('flyoutMenuProps');
-        expect(flyoutMenuProps).toEqual(
-          expect.objectContaining({
-            title: 'Document #new::1::',
-            hideTitle: false,
-          })
-        );
+      const records = buildDataTableRecordList({
+        records: hits as EsHitRecord[],
+        dataView: dataViewMock,
+        processRecord: (record) => scopedProfilesManager.resolveDocumentProfile({ record }),
       });
+      const { component } = await mountComponent({ records, services });
+
+      const content = findTestSubject(component, 'kbnDocViewer');
+      expect(content.text()).toBe('Mock tab');
+
+      // TODO: check title text content directly after migrating the test to RTL https://github.com/elastic/kibana/issues/222939
+      const flyout = component.find('EuiFlyout');
+      const flyoutMenuProps = flyout.prop('flyoutMenuProps');
+      expect(flyoutMenuProps).toEqual(
+        expect.objectContaining({
+          title: 'Document #new::1::',
+          hideTitle: false,
+        })
+      );
     });
   });
 });
diff --git a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.tsx b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.tsx
index 7db8f42cd5b7c..87d108cdb89d9 100644
--- a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.tsx
+++ b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout.tsx
@@ -19,7 +19,6 @@ import { DiscoverFlyouts, dismissAllFlyoutsExceptFor } from '@kbn/discover-utils
 import { UnifiedDocViewerFlyout } from '@kbn/unified-doc-viewer-plugin/public';
 import { useDiscoverServices } from '../../hooks/use_discover_services';
 import { useFlyoutActions } from './use_flyout_actions';
-import { useDiscoverCustomization } from '../../customizations';
 import { DiscoverGridFlyoutActions } from './discover_grid_flyout_actions';
 import type { DocViewerExtensionParams } from '../../context_awareness';
 import { useProfileAccessor } from '../../context_awareness';
@@ -79,13 +78,11 @@ export function DiscoverGridFlyout({
   hideFilteringOnComputedColumns,
 }: DiscoverGridFlyoutProps) {
   const services = useDiscoverServices();
-  const flyoutCustomization = useDiscoverCustomization('flyout');
   const isESQLQuery = isOfAggregateQueryType(query);
   // Get actual hit with updated highlighted searches
   const actualHit = useMemo(() => hits?.find(({ id }) => id === hit?.id) || hit, [hit, hits]);
 
   const { flyoutActions } = useFlyoutActions({
-    actions: flyoutCustomization?.actions,
     dataView,
     rowIndex: actualHit.raw._index,
     rowId: actualHit.raw._id,
@@ -99,15 +96,12 @@ export function DiscoverGridFlyout({
   });
   const docViewer = useMemo(() => {
     const getDocViewer = getDocViewerAccessor(() => ({
-      title: flyoutCustomization?.title,
-      docViewsRegistry: (registry: DocViewsRegistry) =>
-        typeof flyoutCustomization?.docViewsRegistry === 'function'
-          ? flyoutCustomization.docViewsRegistry(registry)
-          : registry,
+      title: undefined,
+      docViewsRegistry: (registry: DocViewsRegistry) => registry,
     }));
 
     return getDocViewer({ actions: docViewerExtensionActions ?? {}, record: actualHit });
-  }, [actualHit, docViewerExtensionActions, flyoutCustomization, getDocViewerAccessor]);
+  }, [actualHit, docViewerExtensionActions, getDocViewerAccessor]);
 
   useEffect(() => {
     dismissAllFlyoutsExceptFor(DiscoverFlyouts.docViewer);
@@ -116,14 +110,12 @@ export function DiscoverGridFlyout({
   return (
     <UnifiedDocViewerFlyout
       flyoutTitle={docViewer.title}
-      flyoutDefaultWidth={flyoutCustomization?.size}
       flyoutActions={
         !isESQLQuery && flyoutActions.length > 0 ? (
           <DiscoverGridFlyoutActions flyoutActions={flyoutActions} />
         ) : null
       }
       flyoutWidthLocalStorageKey={FLYOUT_WIDTH_KEY}
-      FlyoutCustomBody={flyoutCustomization?.Content}
       services={services}
       docViewsRegistry={docViewer.docViewsRegistry}
       isEsqlQuery={isESQLQuery}
diff --git a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.test.tsx b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.test.tsx
new file mode 100644
index 0000000000000..c29dd6aa98115
--- /dev/null
+++ b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.test.tsx
@@ -0,0 +1,102 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+import { screen } from '@testing-library/react';
+import { renderWithI18n } from '@kbn/test-jest-helpers';
+import { DiscoverGridFlyoutActions } from './discover_grid_flyout_actions';
+import React from 'react';
+import userEvent from '@testing-library/user-event';
+import type { FlyoutActionItem } from './types';
+
+let mockBreakpointSize: string | undefined;
+
+jest.mock('@elastic/eui', () => {
+  const original = jest.requireActual('@elastic/eui');
+  return {
+    ...original,
+    useIsWithinBreakpoints: jest.fn((breakpoints: string[]) => {
+      if (mockBreakpointSize && breakpoints.includes(mockBreakpointSize)) {
+        return true;
+      }
+
+      return original.useIsWithinBreakpoints(breakpoints);
+    }),
+    useResizeObserver: jest.fn(() => ({ width: 1000, height: 1000 })),
+  };
+});
+
+const setup = ({
+  breakpointSize,
+  flyoutActions,
+}: {
+  breakpointSize?: string;
+  flyoutActions: FlyoutActionItem[];
+}) => {
+  mockBreakpointSize = breakpointSize;
+  renderWithI18n(<DiscoverGridFlyoutActions flyoutActions={flyoutActions} />);
+  return { user: userEvent.setup() };
+};
+
+const generateFlyoutActions = (count: number): FlyoutActionItem[] =>
+  Array.from({ length: count }, (_, i) => ({
+    id: `action-item-${i}`,
+    enabled: true,
+    label: `Action ${i}`,
+    iconType: 'document',
+    dataTestSubj: `customActionItem${i}`,
+    onClick: jest.fn(),
+  }));
+
+describe('DiscoverGridFlyoutActions', () => {
+  beforeEach(() => {
+    mockBreakpointSize = undefined;
+  });
+
+  it('should display full size action buttons', async () => {
+    setup({ flyoutActions: generateFlyoutActions(3) });
+
+    expect(screen.getByText('Action 0')).toBeInTheDocument();
+    expect(screen.getByText('Action 1')).toBeInTheDocument();
+    expect(screen.getByText('Action 2')).toBeInTheDocument();
+  });
+
+  it('should display icon action buttons and overflow menu', async () => {
+    const { user } = setup({ flyoutActions: generateFlyoutActions(4) });
+
+    expect(screen.queryByText('Action 0')).not.toBeInTheDocument();
+    expect(screen.getByTestId('customActionItem0')).toBeInTheDocument();
+    expect(screen.queryByText('Action 1')).not.toBeInTheDocument();
+    expect(screen.getByTestId('customActionItem1')).toBeInTheDocument();
+    expect(screen.queryByText('Action 2')).not.toBeInTheDocument();
+    expect(screen.getByTestId('customActionItem2')).toBeInTheDocument();
+    expect(screen.queryByText('Action 3')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('customActionItem3')).not.toBeInTheDocument();
+
+    await user.click(screen.getByTestId('docViewerMoreFlyoutActionsButton'));
+
+    expect(screen.getByText('Action 3')).toBeInTheDocument();
+  });
+
+  it('should display only a menu in mobile view', async () => {
+    const { user } = setup({ breakpointSize: 's', flyoutActions: generateFlyoutActions(3) });
+
+    expect(screen.queryByText('Action 0')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('customActionItem0')).not.toBeInTheDocument();
+    expect(screen.queryByText('Action 1')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('customActionItem1')).not.toBeInTheDocument();
+    expect(screen.queryByText('Action 2')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('customActionItem2')).not.toBeInTheDocument();
+
+    await user.click(screen.getByTestId('docViewerMobileActionsButton'));
+
+    expect(screen.getByText('Action 0')).toBeInTheDocument();
+    expect(screen.getByText('Action 1')).toBeInTheDocument();
+    expect(screen.getByText('Action 2')).toBeInTheDocument();
+  });
+});
diff --git a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.tsx b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.tsx
index fe569175214b6..e78dc3410d351 100644
--- a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.tsx
+++ b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/discover_grid_flyout_actions.tsx
@@ -26,7 +26,7 @@ import {
   useResizeObserver,
   useIsWithinBreakpoints,
 } from '@elastic/eui';
-import type { FlyoutActionItem } from '../../customizations';
+import type { FlyoutActionItem } from './types';
 
 const MAX_VISIBLE_ACTIONS_BEFORE_THE_FOLD = 3;
 
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_types/field_list_customisation.ts b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/types.ts
similarity index 60%
rename from src/platform/plugins/shared/discover/public/customizations/customization_types/field_list_customisation.ts
rename to src/platform/plugins/shared/discover/public/components/discover_grid_flyout/types.ts
index c694f429d9a6f..188cdf566c66b 100644
--- a/src/platform/plugins/shared/discover/public/customizations/customization_types/field_list_customisation.ts
+++ b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/types.ts
@@ -7,7 +7,16 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
-export interface FieldListCustomization {
-  id: 'field_list';
-  logsFieldsEnabled: boolean; // TODO / NOTE: Just temporary until Discover's data type contextual awareness lands.
+import type { IconType } from '@elastic/eui';
+import type { MouseEventHandler } from 'react';
+
+export interface FlyoutActionItem {
+  id: string;
+  enabled: boolean;
+  label: string;
+  helpText?: string;
+  iconType: IconType;
+  onClick: (() => void) | MouseEventHandler;
+  href?: string;
+  dataTestSubj?: string;
 }
diff --git a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/use_flyout_actions.tsx b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/use_flyout_actions.tsx
index d1ab3abc4c53c..6c8d678dea54e 100644
--- a/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/use_flyout_actions.tsx
+++ b/src/platform/plugins/shared/discover/public/components/discover_grid_flyout/use_flyout_actions.tsx
@@ -8,57 +8,50 @@
  */
 
 import { i18n } from '@kbn/i18n';
-import type { FlyoutActionItem, FlyoutCustomization } from '../../customizations';
+import { useMemo } from 'react';
 import type { UseNavigationProps } from '../../hooks/use_navigation_props';
 import { useNavigationProps } from '../../hooks/use_navigation_props';
+import type { FlyoutActionItem } from './types';
 
-interface UseFlyoutActionsParams extends UseNavigationProps {
-  actions?: FlyoutCustomization['actions'];
-}
-
-export const useFlyoutActions = ({
-  actions,
-  ...props
-}: UseFlyoutActionsParams): { flyoutActions: FlyoutActionItem[] } => {
+export const useFlyoutActions = (
+  props: UseNavigationProps
+): { flyoutActions: FlyoutActionItem[] } => {
   const { dataView } = props;
   const { singleDocHref, contextViewHref, onOpenSingleDoc, onOpenContextView } =
     useNavigationProps(props);
 
-  const {
-    viewSingleDocument = { disabled: false },
-    viewSurroundingDocument = { disabled: false },
-  } = actions?.defaultActions ?? {};
-  const customActions = [...(actions?.getActionItems?.() ?? [])];
+  const flyoutActions = useMemo(() => {
+    const actions: FlyoutActionItem[] = [
+      {
+        id: 'singleDocument',
+        enabled: true,
+        dataTestSubj: 'docTableRowAction',
+        iconType: 'document',
+        href: singleDocHref,
+        onClick: onOpenSingleDoc,
+        label: i18n.translate('discover.grid.tableRow.viewSingleDocumentLinkLabel', {
+          defaultMessage: 'View single document',
+        }),
+      },
+      {
+        id: 'surroundingDocument',
+        enabled: Boolean(dataView.isTimeBased() && dataView.id),
+        dataTestSubj: 'docTableRowAction',
+        iconType: 'documents',
+        href: contextViewHref,
+        onClick: onOpenContextView,
+        label: i18n.translate('discover.grid.tableRow.viewSurroundingDocumentsLinkLabel', {
+          defaultMessage: 'View surrounding documents',
+        }),
+        helpText: i18n.translate('discover.grid.tableRow.viewSurroundingDocumentsHover', {
+          defaultMessage:
+            'Inspect documents that occurred before and after this document. Only pinned filters remain active in the Surrounding documents view.',
+        }),
+      },
+    ];
 
-  const flyoutActions: FlyoutActionItem[] = [
-    {
-      id: 'singleDocument',
-      enabled: !viewSingleDocument.disabled,
-      dataTestSubj: 'docTableRowAction',
-      iconType: 'document',
-      href: singleDocHref,
-      onClick: onOpenSingleDoc,
-      label: i18n.translate('discover.grid.tableRow.viewSingleDocumentLinkLabel', {
-        defaultMessage: 'View single document',
-      }),
-    },
-    {
-      id: 'surroundingDocument',
-      enabled: Boolean(!viewSurroundingDocument.disabled && dataView.isTimeBased() && dataView.id),
-      dataTestSubj: 'docTableRowAction',
-      iconType: 'documents',
-      href: contextViewHref,
-      onClick: onOpenContextView,
-      label: i18n.translate('discover.grid.tableRow.viewSurroundingDocumentsLinkLabel', {
-        defaultMessage: 'View surrounding documents',
-      }),
-      helpText: i18n.translate('discover.grid.tableRow.viewSurroundingDocumentsHover', {
-        defaultMessage:
-          'Inspect documents that occurred before and after this document. Only pinned filters remain active in the Surrounding documents view.',
-      }),
-    },
-    ...customActions,
-  ];
+    return actions.filter((action) => action.enabled);
+  }, [contextViewHref, dataView, onOpenContextView, onOpenSingleDoc, singleDocHref]);
 
-  return { flyoutActions: flyoutActions.filter((action) => action.enabled) };
+  return { flyoutActions };
 };
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_provider.test.tsx b/src/platform/plugins/shared/discover/public/customizations/customization_provider.test.tsx
index ed91b91af17a5..12ddbb8408997 100644
--- a/src/platform/plugins/shared/discover/public/customizations/customization_provider.test.tsx
+++ b/src/platform/plugins/shared/discover/public/customizations/customization_provider.test.tsx
@@ -28,7 +28,7 @@ describe('getConnectedCustomizationService', () => {
     const promise = new Promise<() => void>((resolve) => {
       resolveCallback = resolve;
     });
-    const callback = jest.fn(({ customizations }) => {
+    const callback = jest.fn(({}) => {
       return promise;
     });
     const customizationCallbacks: CustomizationCallback[] = [callback];
@@ -59,11 +59,11 @@ describe('getConnectedCustomizationService', () => {
 
 describe('useDiscoverCustomization', () => {
   it('should provide customization', () => {
-    const customization: DiscoverCustomization = { id: 'top_nav' };
-    const wrapper = renderHook(() => useDiscoverCustomization('top_nav'), {
+    const customization: DiscoverCustomization = { id: 'search_bar' };
+    const service = createCustomizationService();
+    service.set(customization);
+    const wrapper = renderHook(() => useDiscoverCustomization('search_bar'), {
       wrapper: ({ children }: React.PropsWithChildren<{}>) => {
-        const service = createCustomizationService();
-        service.set(customization);
         return (
           <DiscoverTestProvider customizationService={service}>{children}</DiscoverTestProvider>
         );
@@ -73,14 +73,14 @@ describe('useDiscoverCustomization', () => {
   });
 
   it('should allow changing the customization', () => {
-    const customization: DiscoverCustomization = { id: 'top_nav' };
+    const customization: DiscoverCustomization = { id: 'search_bar' };
     const service = createCustomizationService();
+    service.set(customization);
     const wrapper = renderHook(({ id }) => useDiscoverCustomization(id), {
       initialProps: { id: customization.id } as React.PropsWithChildren<{
         id: DiscoverCustomizationId;
       }>,
       wrapper: ({ children }) => {
-        service.set(customization);
         return (
           <DiscoverTestProvider customizationService={service}>{children}</DiscoverTestProvider>
         );
@@ -94,9 +94,9 @@ describe('useDiscoverCustomization', () => {
   });
 
   it('should provide undefined if customization is not found', () => {
-    const wrapper = renderHook(() => useDiscoverCustomization('top_nav'), {
+    const service = createCustomizationService();
+    const wrapper = renderHook(() => useDiscoverCustomization('search_bar'), {
       wrapper: ({ children }: React.PropsWithChildren<{}>) => {
-        const service = createCustomizationService();
         return (
           <DiscoverTestProvider customizationService={service}>{children}</DiscoverTestProvider>
         );
@@ -108,11 +108,11 @@ describe('useDiscoverCustomization', () => {
 
 describe('useDiscoverCustomization$', () => {
   it('should provide customization$', () => {
-    const customization: DiscoverCustomization = { id: 'top_nav' };
-    const wrapper = renderHook(() => useDiscoverCustomization$('top_nav'), {
+    const customization: DiscoverCustomization = { id: 'search_bar' };
+    const service = createCustomizationService();
+    service.set(customization);
+    const wrapper = renderHook(() => useDiscoverCustomization$('search_bar'), {
       wrapper: ({ children }: React.PropsWithChildren<{}>) => {
-        const service = createCustomizationService();
-        service.set(customization);
         return (
           <DiscoverTestProvider customizationService={service}>{children}</DiscoverTestProvider>
         );
@@ -126,14 +126,14 @@ describe('useDiscoverCustomization$', () => {
   });
 
   it('should allow changing the customization', () => {
-    const customization: DiscoverCustomization = { id: 'top_nav' };
+    const customization: DiscoverCustomization = { id: 'search_bar' };
     const service = createCustomizationService();
+    service.set(customization);
     const wrapper = renderHook(({ id }) => useDiscoverCustomization$(id), {
       initialProps: { id: customization.id } as React.PropsWithChildren<{
         id: DiscoverCustomizationId;
       }>,
       wrapper: ({ children }) => {
-        service.set(customization);
         return (
           <DiscoverTestProvider customizationService={service}>{children}</DiscoverTestProvider>
         );
@@ -154,9 +154,9 @@ describe('useDiscoverCustomization$', () => {
   });
 
   it('should provide undefined if customization is not found', () => {
-    const wrapper = renderHook(() => useDiscoverCustomization$('top_nav'), {
+    const service = createCustomizationService();
+    const wrapper = renderHook(() => useDiscoverCustomization$('search_bar'), {
       wrapper: ({ children }: React.PropsWithChildren<{}>) => {
-        const service = createCustomizationService();
         return (
           <DiscoverTestProvider customizationService={service}>{children}</DiscoverTestProvider>
         );
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_service.test.ts b/src/platform/plugins/shared/discover/public/customizations/customization_service.test.ts
index cb0bdcd5240d2..941a2c088a36b 100644
--- a/src/platform/plugins/shared/discover/public/customizations/customization_service.test.ts
+++ b/src/platform/plugins/shared/discover/public/customizations/customization_service.test.ts
@@ -19,9 +19,9 @@ describe('createCustomizatonService', () => {
   describe('set', () => {
     it('should add a customization', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(undefined);
@@ -32,18 +32,18 @@ describe('createCustomizatonService', () => {
     it('should update a customization', async () => {
       const service = createCustomizationService();
       const customization: DiscoverCustomization = {
-        id: 'top_nav',
-        defaultMenu: { newItem: { disabled: true } },
+        id: 'search_bar',
+        hideDataViewPicker: true,
       };
       service.set(customization);
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(customization);
       const updatedCustomization: DiscoverCustomization = {
         ...customization,
-        defaultMenu: { newItem: { disabled: false } },
+        hideDataViewPicker: false,
       };
       service.set(updatedCustomization);
       expect(current).toBe(updatedCustomization);
@@ -52,20 +52,20 @@ describe('createCustomizatonService', () => {
     it('should remain disabled when updating a customization', async () => {
       const service = createCustomizationService();
       const customization: DiscoverCustomization = {
-        id: 'top_nav',
-        defaultMenu: { newItem: { disabled: true } },
+        id: 'search_bar',
+        hideDataViewPicker: true,
       };
       service.set(customization);
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(customization);
-      service.disable('top_nav');
+      service.disable('search_bar');
       expect(current).toBeUndefined();
       const updatedCustomization: DiscoverCustomization = {
         ...customization,
-        defaultMenu: { newItem: { disabled: false } },
+        hideDataViewPicker: false,
       };
       service.set(updatedCustomization);
       expect(current).toBeUndefined();
@@ -75,24 +75,24 @@ describe('createCustomizatonService', () => {
   describe('get', () => {
     it('should return a customization', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       service.set(customization);
-      const current = service.get('top_nav');
+      const current = service.get('search_bar');
       expect(current).toBe(customization);
     });
 
     it('should return undefined if customization is disabled', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       service.set(customization);
-      service.disable('top_nav');
-      const current = service.get('top_nav');
+      service.disable('search_bar');
+      const current = service.get('search_bar');
       expect(current).toBeUndefined();
     });
 
     it('should return undefined if customization does not exist', async () => {
       const service = createCustomizationService();
-      const current = service.get('top_nav');
+      const current = service.get('search_bar');
       expect(current).toBeUndefined();
     });
   });
@@ -100,10 +100,10 @@ describe('createCustomizatonService', () => {
   describe('get$', () => {
     it('should return a customization', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       service.set(customization);
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(customization);
@@ -111,21 +111,21 @@ describe('createCustomizatonService', () => {
 
     it('should return undefined if customization is disabled', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       service.set(customization);
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(customization);
-      service.disable('top_nav');
+      service.disable('search_bar');
       expect(current).toBeUndefined();
     });
 
     it('should return undefined if customization does not exist', async () => {
       const service = createCustomizationService();
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBeUndefined();
@@ -135,42 +135,42 @@ describe('createCustomizatonService', () => {
   describe('disable', () => {
     it('should disable a customization', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       service.set(customization);
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(customization);
-      service.disable('top_nav');
+      service.disable('search_bar');
       expect(current).toBeUndefined();
     });
 
     it('should not throw if customization does not exist', async () => {
       const service = createCustomizationService();
-      service.disable('top_nav');
+      service.disable('search_bar');
     });
   });
 
   describe('enable', () => {
     it('should enable a customization', async () => {
       const service = createCustomizationService();
-      const customization: DiscoverCustomization = { id: 'top_nav' };
+      const customization: DiscoverCustomization = { id: 'search_bar' };
       service.set(customization);
       let current: DiscoverCustomization | undefined;
-      service.get$('top_nav').subscribe((value) => {
+      service.get$('search_bar').subscribe((value) => {
         current = value;
       });
       expect(current).toBe(customization);
-      service.disable('top_nav');
+      service.disable('search_bar');
       expect(current).toBeUndefined();
-      service.enable('top_nav');
+      service.enable('search_bar');
       expect(current).toBe(customization);
     });
 
     it('should not throw if customization does not exist', async () => {
       const service = createCustomizationService();
-      service.enable('top_nav');
+      service.enable('search_bar');
     });
   });
 });
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_service.ts b/src/platform/plugins/shared/discover/public/customizations/customization_service.ts
index 8bf1cdc7d194f..6248a4824c17c 100644
--- a/src/platform/plugins/shared/discover/public/customizations/customization_service.ts
+++ b/src/platform/plugins/shared/discover/public/customizations/customization_service.ts
@@ -9,22 +9,9 @@
 
 import type { Observable } from 'rxjs';
 import { filter, map, startWith, Subject } from 'rxjs';
-import type {
-  DataTableCustomization,
-  FlyoutCustomization,
-  SearchBarCustomization,
-  TopNavCustomization,
-  UnifiedHistogramCustomization,
-  FieldListCustomization,
-} from './customization_types';
+import type { SearchBarCustomization, UnifiedHistogramCustomization } from './customization_types';
 
-export type DiscoverCustomization =
-  | FlyoutCustomization
-  | SearchBarCustomization
-  | TopNavCustomization
-  | UnifiedHistogramCustomization
-  | DataTableCustomization
-  | FieldListCustomization;
+export type DiscoverCustomization = SearchBarCustomization | UnifiedHistogramCustomization;
 
 export type DiscoverCustomizationId = DiscoverCustomization['id'];
 
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_types/data_table_customisation.ts b/src/platform/plugins/shared/discover/public/customizations/customization_types/data_table_customisation.ts
deleted file mode 100644
index acaa402169060..0000000000000
--- a/src/platform/plugins/shared/discover/public/customizations/customization_types/data_table_customisation.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the "Elastic License
- * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
- * Public License v 1"; you may not use this file except in compliance with, at
- * your election, the "Elastic License 2.0", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-import type { UnifiedDataTableProps } from '@kbn/unified-data-table';
-
-export interface DataTableCustomization {
-  id: 'data_table';
-  logsEnabled: boolean; // TODO / NOTE: Just temporary until Discover's data type contextual awareness lands.
-  rowAdditionalLeadingControls?: UnifiedDataTableProps['rowAdditionalLeadingControls'];
-}
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_types/flyout_customization.ts b/src/platform/plugins/shared/discover/public/customizations/customization_types/flyout_customization.ts
deleted file mode 100644
index 19d5f46f14254..0000000000000
--- a/src/platform/plugins/shared/discover/public/customizations/customization_types/flyout_customization.ts
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the "Elastic License
- * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
- * Public License v 1"; you may not use this file except in compliance with, at
- * your election, the "Elastic License 2.0", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-import type { EuiFlyoutProps, IconType } from '@elastic/eui';
-import type { DataTableRecord } from '@kbn/discover-utils/types';
-import type { DocViewRenderProps } from '@kbn/unified-doc-viewer/types';
-import type { MouseEventHandler } from 'react';
-import type React from 'react';
-import { type ComponentType } from 'react';
-
-export interface FlyoutDefaultActionItem {
-  disabled?: boolean;
-}
-
-export interface FlyoutDefaultActions {
-  viewSingleDocument?: FlyoutDefaultActionItem;
-  viewSurroundingDocument?: FlyoutDefaultActionItem;
-}
-
-export interface FlyoutActionItem {
-  id: string;
-  enabled: boolean;
-  label: string;
-  helpText?: string;
-  iconType: IconType;
-  onClick: (() => void) | MouseEventHandler;
-  href?: string;
-  dataTestSubj?: string;
-}
-
-export interface FlyoutContentProps {
-  actions: Pick<DocViewRenderProps, 'filter' | 'onAddColumn' | 'onRemoveColumn'>;
-  doc: DataTableRecord;
-  renderDefaultContent: () => React.ReactNode;
-}
-
-export interface FlyoutCustomization {
-  id: 'flyout';
-  size?: EuiFlyoutProps['size'];
-  title?: string;
-  actions: {
-    defaultActions?: FlyoutDefaultActions;
-    getActionItems?: () => FlyoutActionItem[];
-  };
-  Content?: ComponentType<FlyoutContentProps>;
-  docViewsRegistry?: DocViewRenderProps['docViewsRegistry'];
-}
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_types/index.ts b/src/platform/plugins/shared/discover/public/customizations/customization_types/index.ts
index c4d781197ca12..95735795d7959 100644
--- a/src/platform/plugins/shared/discover/public/customizations/customization_types/index.ts
+++ b/src/platform/plugins/shared/discover/public/customizations/customization_types/index.ts
@@ -7,9 +7,5 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
-export type * from './flyout_customization';
 export type * from './search_bar_customization';
-export type * from './top_nav_customization';
 export type * from './histogram_customization';
-export type * from './data_table_customisation';
-export type * from './field_list_customisation';
diff --git a/src/platform/plugins/shared/discover/public/customizations/customization_types/top_nav_customization.ts b/src/platform/plugins/shared/discover/public/customizations/customization_types/top_nav_customization.ts
deleted file mode 100644
index ab2be7acb6147..0000000000000
--- a/src/platform/plugins/shared/discover/public/customizations/customization_types/top_nav_customization.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the "Elastic License
- * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
- * Public License v 1"; you may not use this file except in compliance with, at
- * your election, the "Elastic License 2.0", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-export interface TopNavDefaultItem {
-  disabled?: boolean;
-}
-
-export interface TopNavDefaultMenu {
-  newItem?: TopNavDefaultItem;
-  openItem?: TopNavDefaultItem;
-  shareItem?: TopNavDefaultItem;
-  alertsItem?: TopNavDefaultItem;
-  inspectItem?: TopNavDefaultItem;
-  saveItem?: TopNavDefaultItem;
-}
-
-export interface TopNavCustomization {
-  id: 'top_nav';
-  defaultMenu?: TopNavDefaultMenu;
-}
diff --git a/src/platform/plugins/shared/discover/public/index.ts b/src/platform/plugins/shared/discover/public/index.ts
index 28c06ddf7bd19..cbba094e3953a 100644
--- a/src/platform/plugins/shared/discover/public/index.ts
+++ b/src/platform/plugins/shared/discover/public/index.ts
@@ -23,10 +23,8 @@ export type {
   CustomizationCallback,
   DiscoverCustomization,
   DiscoverCustomizationService,
-  FlyoutCustomization,
   SearchBarCustomization,
   UnifiedHistogramCustomization,
-  TopNavCustomization,
 } from './customizations';
 export {
   SEARCH_EMBEDDABLE_TYPE,
diff --git a/src/platform/plugins/shared/unified_doc_viewer/public/index.tsx b/src/platform/plugins/shared/unified_doc_viewer/public/index.tsx
index 189d8711734ac..3b74db124af98 100644
--- a/src/platform/plugins/shared/unified_doc_viewer/public/index.tsx
+++ b/src/platform/plugins/shared/unified_doc_viewer/public/index.tsx
@@ -28,6 +28,7 @@ export const JsonCodeEditor = withSuspense<JsonCodeEditorProps>(
 
 export { useEsDocSearch } from './hooks';
 export { UnifiedDocViewer } from './components/lazy_doc_viewer';
+export type { UnifiedDocViewerFlyoutProps } from './components/doc_viewer_flyout/doc_viewer_flyout';
 export { UnifiedDocViewerFlyout } from './components/lazy_doc_viewer_flyout';
 export { ContentFrameworkSection } from './components/content_framework/lazy_content_framework_section';
 
diff --git a/src/platform/test/examples/discover_customization_examples/customizations.ts b/src/platform/test/examples/discover_customization_examples/customizations.ts
index 47e7dbc458f1b..b3f69b4fc6ba7 100644
--- a/src/platform/test/examples/discover_customization_examples/customizations.ts
+++ b/src/platform/test/examples/discover_customization_examples/customizations.ts
@@ -52,12 +52,6 @@ export default ({ getService, getPageObjects }: FtrProviderContext) => {
       await kibanaServer.savedObjects.cleanStandardList();
     });
 
-    it('Top nav', async () => {
-      await testSubjects.existOrFail('shareTopNavButton');
-      await testSubjects.missingOrFail('discoverNewButton');
-      await testSubjects.missingOrFail('discoverOpenButton');
-    });
-
     it('Search bar', async () => {
       await testSubjects.click('logsViewSelectorButton');
       await testSubjects.click('logsViewSelectorOption-ASavedSearch');
diff --git a/x-pack/platform/test/serverless/functional/test_suites/examples/discover_customization_examples/customizations.ts b/x-pack/platform/test/serverless/functional/test_suites/examples/discover_customization_examples/customizations.ts
index 2fa64c39fc15f..36566a3ec8cea 100644
--- a/x-pack/platform/test/serverless/functional/test_suites/examples/discover_customization_examples/customizations.ts
+++ b/x-pack/platform/test/serverless/functional/test_suites/examples/discover_customization_examples/customizations.ts
@@ -50,12 +50,6 @@ export default ({ getService, getPageObjects }: FtrProviderContext) => {
       await kibanaServer.savedObjects.cleanStandardList();
     });
 
-    it('Top nav', async () => {
-      await testSubjects.existOrFail('shareTopNavButton');
-      await testSubjects.missingOrFail('discoverNewButton');
-      await testSubjects.missingOrFail('discoverOpenButton');
-    });
-
     it('Search bar', async () => {
       await testSubjects.click('logsViewSelectorButton');
       await testSubjects.click('logsViewSelectorOption-ASavedSearch');