[Skia] `NavigatorBar` is invisible in Recommended Fluent template

[morning4coffe-dev]

Current behavior

I created a new project with the VS Wizard (VS Extension version: 5.2.53.66), and the NavigatorBar control is invisible until I click one of the buttons; then it appears:

https://github.com/unoplatform/uno/assets/78549750/38c0c9c4-dba9-43f7-92f0-2ef4606b5205

Console errors

fail: Microsoft.UI.Xaml.Controls.CommandBarFlyout[0] The member CommandBarFlyout.CommandBarFlyout() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Controls.CommandBarFlyout.CommandBarFlyout.CommandBarFlyout%28%29 fail: Microsoft.UI.Xaml.Controls.TextCommandBarFlyout[0] The member TextCommandBarFlyout.TextCommandBarFlyout() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Controls.TextCommandBarFlyout.TextCommandBarFlyout.TextCommandBarFlyout%28%29 fail: Microsoft.UI.Xaml.BrushTransition[0] The member BrushTransition.BrushTransition() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.BrushTransition.BrushTransition.BrushTransition%28%29 fail: Microsoft.UI.Xaml.BrushTransition[0] The member TimeSpan BrushTransition.Duration is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.BrushTransition.TimeSpan%20BrushTransition.Duration fail: Microsoft.UI.Xaml.Controls.ContentPresenter[0] The member BrushTransition ContentPresenter.BackgroundTransition is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Controls.ContentPresenter.BrushTransition%20ContentPresenter.BackgroundTransition fail: Microsoft.UI.Xaml.Media.Animation.PointerUpThemeAnimation[0] The member PointerUpThemeAnimation.PointerUpThemeAnimation() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Media.Animation.PointerUpThemeAnimation.PointerUpThemeAnimation.PointerUpThemeAnimation%28%29 fail: Microsoft.UI.Xaml.Media.Animation.PointerUpThemeAnimation[0] The member void Begin() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Media.Animation.PointerUpThemeAnimation.void%20Begin%28%29 fail: Microsoft.UI.Xaml.Controls.ScrollViewer[0] Zoom-based content alignment is not implemented on this platform. fail: Microsoft.UI.Xaml.Controls.Border[0] The member BrushTransition Border.BackgroundTransition is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Controls.Border.BrushTransition%20Border.BackgroundTransition fail: Microsoft.UI.Xaml.Media.Animation.PointerUpThemeAnimation[0] The member void Deactivate() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Media.Animation.PointerUpThemeAnimation.void%20Deactivate%28%29 fail: Microsoft.UI.Xaml.Media.Animation.PointerDownThemeAnimation[0] The member PointerDownThemeAnimation.PointerDownThemeAnimation() is not implemented. For more information, visit https://aka.platform.uno/notimplemented#m=Microsoft.UI.Xaml.Media.Animation.PointerDownThemeAnimation.PointerDownThemeAnimation.PointerDownThemeAnimation%28%29

Expected behavior

https://github.com/unoplatform/uno/assets/78549750/a5c882fa-874e-4472-a993-5a85ec03d191

How to reproduce it (as minimally and precisely as possible)

1. Open VS and create a new Uno project
2. Choose Recommended
3. Select Fluent and MVVM, create a new project

Workaround

No response

Works on UWP/WinUI

Yes

Environment

No response

NuGet package version(s)

VS Extension version: 5.2.53.66 Uno.Sdk: 5.2.161

Affected platforms

Skia (WPF), Skia (Linux X11), Skia (macOS), Skia (Linux Framebuffer), Skia (GTK)

IDE

Visual Studio 2022

IDE version

17.10.3

Relevant plugins

No response

Anything else we need to know?

Not sure if the issue is more suitable for Toolkit repo or not.