There are so many requests off late to bring back the card/cascade view for tabs. Right now if you see the Grid view for changing tabs, it is not the fault of Brave (and definitely nothing wrong with the user accidentally changing the settings) but it is Chromium which enforces this design. There are no flags to bring back the card view as of now. Brave team is working at their end to bring back the card view, if at all possible.
There are some suggestions to downgrade the brave browser to keep the card view. If you use Brave browser, I assume you are very careful about the privacy and security aspects of browsing. So don’t downgrade the browser version. Rather wait for a solution.
Just writing this so that many can see this. As I see many people create community account just to create the card/cascade view request.