[iOS] OnBackButtonPressed not firing for Shell Navigation Bar button

[Ahamed-Ali]

Description

In .NET 10, overriding OnBackButtonPressed does not capture the click event of the Shell Navigation Bar back button (the arrow in the top-left). While this has been a long-standing inconsistency, the issue is critical in iOS as it prevents intercepting navigation to update parent page states, even when system back gestures are changing.

Steps to Reproduce
Create a .NET 10 MAUI Shell app.
Navigate to a detail page using GoToAsync.
Override OnBackButtonPressed in the detail page.
Click the "Back" arrow in the Navigation Bar.
Expected Behavior: OnBackButtonPressed should be triggered (consistent with Windows platform behavior).
Actual Behavior: The method is not called. Only OnUnappearing is triggered.

Steps to Reproduce

Sample is in this PR link https://github.com/dotnet/maui/pull/33531/changes#diff-07225b8e09e958e5ffcc71bcf64d7a5cf89e00f95fe163ad3b337b59bfa8eb54

Link to public reproduction project repository

No response

Version with bug

Unknown/Other

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, macOS

Affected platform versions

iOS 18, iOS 26, MacOS 26

Did you find any workaround?

No response

Relevant log output

[Dhivya-SF4094]

This issue has been validated in Visual Studio Code 1.109.4 with MAUI versions 10.0.0 and 10.0.41 . It can be reproduced on the iOS and Mac Platform.