CLOCK Vanished

So, lower right task bar is empty. No clock, no running apps like Onedrive, nothing.
I tried everything, and it will not restart.
please tell me something that can work?

UPDATE!

I tried to bring up the SYSTEM (and it starts with the config cog on the screen then vanishes.
So, I cannot bring up my system config

Hi, welcome to ElevenForum.

Since both the clock and the notification/system tray icons are missing, it may be worth restarting Windows Explorer first.

Press Ctrl + Shift + Esc to open Task Manager.
Find Windows Explorer in the Processes list, right-click it, and select Restart.

If the taskbar still doesn't come back correctly, you could also try signing out and back in.

If that doesn't help, let us know whether the entire taskbar is working normally apart from the clock and tray icons, and which Windows 11 version/build you're running.