On the right side, scroll down and click on Taskbar. Choose Taskbar behaviors. Uncheck the Show hover cards for inactive and pinned taskbar apps option to disable the hover cards.

If the Auto-Hide Taskbar feature is not working in Windows 11, then here are some suggestions to help you resolve the issue successfully.

You can hide your taskbar using Windows 11 settings, but that won't hide it completely. The only way to do that is to use a third-party application.