[Windows] Fix RightToLeft is not working for Shell

src/Controls/src/Core/Handlers/Shell/ShellHandler.Windows.cs

@@ -149,6 +149,11 @@ public static void MapFlyout(ShellHandler handler, IFlyoutView flyoutView)
 
 		}
 
+		internal static void MapFlowDirection(ShellHandler handler, Shell view)
+		{
+			handler.PlatformView.UpdateFlowDirection(view);
+		}
+
 		public static void MapIsPresented(ShellHandler handler, IFlyoutView flyoutView)
 		{
 			// WinUI Will close the pane inside of the apply template code

src/Controls/src/Core/Handlers/Shell/ShellHandler.cs

@@ -34,6 +34,7 @@ public partial class ShellHandler
 #if WINDOWS
 					[nameof(Shell.FlyoutIcon)] = MapFlyoutIcon,
 					[nameof(Shell.FlyoutContentTemplate)] = MapFlyout,
+					[nameof(Shell.FlowDirection)] = MapFlowDirection,
 #endif
 				};
 

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue17057.cs

@@ -1,5 +1,4 @@
-#if TEST_FAILS_ON_WINDOWS // To fix the issue in windows https://github.com/dotnet/maui/issues/27947
-using NUnit.Framework;
+using NUnit.Framework;
 using UITest.Appium;
 using UITest.Core;
 
@@ -17,8 +16,8 @@ public Issue17057(TestDevice testDevice) : base(testDevice)
 		public void ShellFlowDirectionUpdate()
 		{
 			App.WaitForElement("label");
+			App.TapShellFlyoutIcon();
 			VerifyScreenshot();
 		}
 	}
-}
-#endif
+}