after "extendBodyBehindAppBar: true in Scaffold" The view show under appbar

[SalarPro]

I have a list view but when I use the "extendBodyBehindAppBar: true ", the view have margin from the appbar, how ever when i use Scrollbar( child: PaginateFirestore(...), )

it over flow the window.

Scaffold( extendBodyBehindAppBar: true, extendBody: true, ...)

here is a video about : 1-In the Search Tab i used the Scrollbar(child: PaginateFirestore(...)) 2-in the Home Tab I used the ListView(children: [...])

https://user-images.githubusercontent.com/18324417/163505074-c4f9017f-6e0e-4d33-b217-1689d2fb5cb3.mp4