TabbedPage with WidthRequest and/or HeightRequest fails to render

### Description

If you add a `WidthRequest` or `HeightRequest` to a `TabbedPage`, it does not render correctly.

Without either, it renders as expected:

If you add a `WidthRequest`, all tabs get crammed into the corner, even if the WidthRequest is wide enough (on iOS, nothing renders):

In addition, the background of the window changes, suggesting a render failure.

If you add a `HeightRequest` or both, the page becomes blank.

### Steps to Reproduce

1. Create a new MAUI app
2. Change your `MainPage.xaml.cs` to inherit from `TabbedPage`:

```csharp
namespace MauiTabbedPageBug;

public partial class MainPage : TabbedPage
{
public MainPage()
{
InitializeComponent();
}
}
```

3. Change your `MainPage.xaml` to a simple tabbed page:

```xml

```

Remove/add the `WidthRequest`/`HeightRequest` attributes.

### Version with bug

Preview 14 (current)

### Last version that worked well

Unknown/Other

### Affected platforms

iOS, macOS

### Affected platform versions

iOS 15.2, macOS 12.3

### Did you find any workaround?

_No response_

### Relevant log output

_No response_

Start with the reproduced MAUI app in MainPage.xaml.cs and MainPage.xaml, using the TabbedPage with WidthRequest and HeightRequest on iOS and macOS. Run the listed steps, compare behavior with and without those attributes, and consider the issue done when the tabs render correctly in both cases.

Written by the indexing model from the issue text.