How can I add scrolls to overlapping cards in Flutter?
What you are trying to do is to Have both ListViews scroll at the same time that won't happen.
What you should do is to lock the inner cards and Display all of them so that the outer card can scroll with them.
in the inner cards, ListView put this:
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
This should solve your issue.