iOS wrong trimmed Relative bindings under config XamlInflator and AOT

[jingliancui]

Description

Dotnet 10 introduce MauiXamlInflator for performance improvement.

But it will break the Relative bindings under AOT in release mode.

https://learn.microsoft.com/en-us/dotnet/maui/fundamentals/data-binding/relative-bindings?view=net-maui-10.0#bind-to-an-ancestor

Steps to Reproduce

1. Open the sampleapp using vscode
2. Set the debugging mode to release
3. Run the app in device (my device is iPhone12 iOS 26.2.1)
4. Click any button in the app

Expect:
Popup will be shown

Actual:
Nothing happen

Other info:

1. add config MauiXamlInflator and AOT will build with this warning
   /Users/ericcui/Desktop/issue/SampleApp/obj/Release/net10.0-ios/ios-arm64/Microsoft.Maui.Controls.SourceGen/Microsoft.Maui.Controls.SourceGen.XamlGenerator/MainPage.xaml.xsg.cs(93,23): warning IL2026: Using member 'Microsoft.Maui.Controls.Binding.Binding(String, BindingMode, IValueConverter, Object, String, Object)' which has 'RequiresUnreferencedCodeAttribute' can break functionality when trimming application code. Using bindings with string paths is not trim safe. Use expression-based binding instead.

2.remove config MauiXamlInflator in csproj will run fine in release mode.

3.nothing build warning will be shown in debug mode, which will cause issue in release stage, so suggest show something in debug stage.

4.Not sure if this issue will help for those issues or not:
#26509
#22368
#24949

Link to public reproduction project repository

https://github.com/jingliancui/MauiXamlInflatorAOTIssue

Version with bug

10.0.40

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 26.2.1

Did you find any workaround?

Remove config MauiXamlInflator in csproj

Relevant log output

*  Executing task: dotnet build -t:Build -p:Configuration=Release -f net10.0-ios -r ios-arm64 -p:CustomAfterMicrosoftCSharpTargets=/Users/ericcui/.vscode/extensions/ms-dotnettools.dotnet-maui-1.13.20-darwin-arm64/dist/resources/Custom.After.Microsoft.CSharp.targets -p:MauiVSCodeBuildOutputFile=/var/folders/81/70kf_yv12x1c7nrdnd3m6vrw0000gn/T/dotnet-maui/maui-vsc-eefb5af8-8e34-49c5-a142-120be62048c3.json -p:MauiTargetProject=/Users/ericcui/Desktop/issue/SampleApp/SampleApp.csproj -p:XamlTools=/Users/ericcui/.vscode/extensions/ms-dotnettools.csharp-2.120.3-darwin-arm64/.xamlTools -p:EnableDiagnostics=True -p:EnableMauiXamlDiagnostics=True /Users/ericcui/Desktop/issue/SampleApp/SampleApp.csproj 

  SampleApp net10.0-ios ios-arm64 succeeded with 1 warning(s) (140.7s) → bin/Release/net10.0-ios/ios-arm64/SampleApp.dll
    /Users/ericcui/Desktop/issue/SampleApp/obj/Release/net10.0-ios/ios-arm64/Microsoft.Maui.Controls.SourceGen/Microsoft.Maui.Controls.SourceGen.XamlGenerator/MainPage.xaml.xsg.cs(93,23): warning IL2026: Using member 'Microsoft.Maui.Controls.Binding.Binding(String, BindingMode, IValueConverter, Object, String, Object)' which has 'RequiresUnreferencedCodeAttribute' can break functionality when trimming application code. Using bindings with string paths is not trim safe. Use expression-based binding instead.

Build succeeded with 1 warning(s) in 140.8s
 *  Terminal will be reused by tasks, press any key to close it.

[TamilarasanSF4853]

This issue has been validated in Visual Studio Code 1.109.3 with MAUI versions 9.0.120, 10.0.0-preview1, 10.0.0-preview7, 10.0.0-rc1, 10.0.0 and 10.0.40. It can be reproduced from 10.0.0-rc1 on the iOS platform.

Screen.Recording.2026-02-16.at.12.33.13.PM.mov