[Custom Control] HotReload doesn't work for newly added nested items

Description

Continuation of https://github.com/dotnet/maui/issues/10390, but I’ve implemented IVisualTreeElement. Only now the HotReload works for items defined in XAML at launch, but doesn’t work for items added via HotReload. I’ve noticed the IReadOnlyList<IVisualTreeElement> IVisualTreeElement.GetVisualChildren() method is not called when adding new nested items, maybe I should handle collection changes somehow so it’s called, @PureWeen?

https://user-images.githubusercontent.com/21204523/199957266-18de9468-d27d-4c95-beed-68c0b97377a5.mov

Steps to Reproduce

Watch the video

Link to public reproduction project repository

https://github.com/the8thC/ElementVisuaElementHotReload

Version with bug

7.0 Release Candidate 2

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android, I was not able test on other platforms

Affected platform versions

iOS 16, Android API 32

Did you find any workaround?

Remove and add the whole parent control and HotReload works for all items

Relevant log output

No response

[drasticactions]

Before we close it, we should probably consider documenting this somewhere (Creating custom controls and writing IVisualTreeElement overrides), so others don’t get bit by the same thing. @Redth Is this possible to have this done? Maybe for the backlog?

[Redth]

Thanks!