This is what helped me and I hope you add it, a check for Nvidia FPS/Performance counter. When I finally removed it, it resolved the issue I had here, where the taskbar would not show itself when I would hover over it on a full-screen app. Which I found on a microsoft forum.
How to Fix Windows 11 Taskbar Not Hiding Automatically
Is the Windows Taskbar not hiding automatically? If yes. here's how to fix auto-hide Taskbar not working issue in Windows 11.
