Add Second Set of Tabs to .NET MAUI app with Shell - maui

Question

I want to add a second set of tabs on a page that is accessed through tabs defined in AppShell in my .NET MAUI app. According to the documentation, TabbedPage is not compatible with .NET MAUI apps that use AppShell. How do I achieve this -- preferably with standard XAML and not through a third party solution.
Here's the look I want:
As mentioned, I define my tabs in AppShell like this:
<FlyoutItem Title="Home" Icon="home.png">
<Tab Title="Tiger" Icon="tiger.png">
<ShellContent Route="Tiger" ContentTemplate="{DataTemplate local: Tiger}" />
</Tab>
<Tab Title="Giraffe" Icon="giraffe.png">
<ShellContent Route="Giraffe" ContentTemplate="{DataTemplate local: Giraffe}" />
</Tab>
<Tab Title="Moose" Icon="moose.png">
<ShellContent Route="Moose" ContentTemplate="{DataTemplate local: Moose}" />
</Tab>
<Tab Title="Elephant" Icon="elephant.png">
<ShellContent Route="Elephant" ContentTemplate="{DataTemplate local: Elephant}" />
</Tab>
</FlyoutItem>

Answer 1

If I understand your question correctly, you just need to add additional <ShellContent> elements inside your <Tab> definitions as described in the docs:
<FlyoutItem Title="Home" Icon="home.png">
<Tab Title="Tiger" Icon="tiger.png">
<ShellContent Route="Tiger" ContentTemplate="{DataTemplate local: Tiger}" />
<ShellContent Route="Tiger2" ContentTemplate="{DataTemplate local: Tiger2}" />
<ShellContent Route="Tiger3" ContentTemplate="{DataTemplate local: Tiger3}" />
</Tab>
<Tab Title="Giraffe" Icon="giraffe.png">
<ShellContent Route="Giraffe" ContentTemplate="{DataTemplate local: Giraffe}" />
</Tab>
<Tab Title="Moose" Icon="moose.png">
<ShellContent Route="Moose" ContentTemplate="{DataTemplate local: Moose}" />
</Tab>
<Tab Title="Elephant" Icon="elephant.png">
<ShellContent Route="Elephant" ContentTemplate="{DataTemplate local: Elephant}" />
</Tab>
</FlyoutItem>
I don't know if this works together with the <FlyoutItem>, though.

Answer 2

You can not.
You can use this auto wrapping, and get confused all you want.
But in the end, it all gets to the point, where your TabBar (that is Shell Item), contains Tabs (that are Shell Sections) and those contain a list of Shell Contents.
You can navigate between Items, and the Shell itself will provide means to navigate between Sections and Contents.
But those are not tabs.