[BUG] MAUI FlyoutPage CanNavigateAsync not called

[berhir]

Description

Same as #2914 but with a sample attached.

Some of our users managed to accidentally close the app by swiping back on the main page on Android.
To prevent this, I tried to implement the IConfirmNavigationAsync interface in our MainPageViewModel.

public Task<bool> CanNavigateAsync(INavigationParameters parameters)
{
    if (parameters.GetNavigationMode() == Prism.Navigation.NavigationMode.Back)
    {
        return Task.FromResult(false);
    }

    return Task.FromResult(true);
}

Unfortunately, this method never gets called. Instead, I see an exception in our logs:

Navigation failed
Prism.Navigation.NavigationException: Cannot Pop Application MainPage
   at Prism.Navigation.PageNavigationService.GoBackAsync(INavigationParameters parameters)

We are using a FlyoutPage as main page.

I created a sample here: https://github.com/berhir/Prism/tree/PrismFlyoutCanNavigateIssue/PrismFlyoutCanNavigate

I tested it on Android and the CanNavigateAsync method of the MainViewModel never gets called.
See https://github.com/berhir/Prism/blob/PrismFlyoutCanNavigateIssue/PrismFlyoutCanNavigate/MainViewModel.cs

You can test my workaround by uncommenting the code in this file: https://github.com/berhir/Prism/blob/PrismFlyoutCanNavigateIssue/PrismFlyoutCanNavigate/MainPage.xaml.cs

Steps to Reproduce

1. Create a new MAUI project with Prism
2. Use a FlyoutPage as main page
3. Implement the IConfirmNavigationAsync interface and disallow navigating back on the MainPageViewModel
4. Run the app and swipe back on the main page

Expected result: The IConfirmNavigationAsync.CanNavigateAsync method gets called and I can prevent that the app gets closed.
Actual result: The IConfirmNavigationAsync.CanNavigateAsync method gets not called and the app gets closed.

Platform with bug

.NET MAUI

Affected platforms

Android

Did you find any workaround?

As a workaround I override the OnBackButtonPressed method of the FlyoutPage:

protected override bool OnBackButtonPressed()
{
    // The FlyoutPage is the container and OnBackButtonPressed gets also called when navigating back in the details navigation page
    if (Detail is NavigationPage navPage && (navPage.Navigation.NavigationStack.Count > 1 || navPage.Navigation.ModalStack.Count > 1))
    {
        return base.OnBackButtonPressed();
    }

    return true;
}

Relevant log output

No response

[berhir]

Maybe related to #2990?