[iOS] SafeArea is not applied when a ContentPage uses a ControlTemplate

[MatthewJer]

Description

When a ContentPage uses a ControlTemplate, the ContentPresenter no longer appears to respect the SafeArea.
Wrapping the ContentPresenter in a Border inside the ControlTemplate causes the Border to extend into the SafeArea, while the ContentPresenter itself still ignores it.
This behavior worked correctly in .NET 8 and .NET 9.
The now-deprecated IgnoreSafeArea property also has no effect.
Any suggestions for a temporary workaround would be greatly appreciated.

Steps to Reproduce

1. Clone the provided reproduction repository.
2. Open the solution.
3. Run the application on an iOS device or simulator.

Expected Behavior

• The ContentPresenter should respect the SafeArea.
• Any content wrapped around the ContentPresenter (e.g. a Border) should be laid out inside the SafeArea.
• This matches the behavior observed in .NET 8 and .NET 9.

Actual Behavior

• As soon as the ContentPage uses a ControlTemplate, the ContentPresenter no longer respects the SafeArea.
• If a Border is placed around the ContentPresenter inside the ControlTemplate, the Border extends into the SafeArea.
• The ContentPresenter itself still ignores the SafeArea.
• The deprecated IgnoreSafeArea property has no effect.

Link to public reproduction project repository

https://github.com/MatthewJer/TestSafeAreaEdges

Version with bug

10.0.20

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

9.0.120 SR12

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [iOS] UseSafeArea is not working when ControlTemplate is set #25630

[LogishaSelvarajSF4525]

This issue has been validated in Visual Studio Code 1.108.0 with MAUI versions 10.0.0, 10.0.10 & 10.0.20. It can be reproducible on iOS platform.
Note: This issue does not reproduced on Android platform.

Output Screenshot

In Android	In iOS