Flyout separators

Question

Hello

So, I am trying to clone this design

Note the shell will only be visible on windows

Note: the red square, is becouse of privacy reasons

if you read this https://learn.microsoft.com/en-us/dotnet/maui/fundamentals/shell/flyout?view=net-maui-9.0

items in a shell goes one down the other, so how can I leave that huge space in the middle and put a separator line