On Windows, I am finding that there is a chunk of unused space above the row with the back button and page title.
By experimentation, I have found that I can apply a negative TranslationY of -40 on the very first NavigationPage, then for ContentPages that don't have a toolbar at the bottom apply negative padding at the bottom of -40 to make use of the space created at the bottom of the page by moving everything up.
I have no idea why this is necessary. Whilst XF on Windows makes use of BottomAppBar to put a toolbar at the bottom of a page (although I have raised a bug already about that), I don't see anything to suggest that TopAppBar is being used. If it's not that, I'm not sure why that chunk of space is available. It's quite possible that there's something inherent in Windows apps, even if not created with XF, that I don't know about.
By playing with colors, I can see that the unused space at the top is part of the NavigationPage, but is above the NavigationBar.
Can anyone advise please?