One handed mode icon stuck on screen and doesn't work

[lewe konto]

Hi. The problem is one handed icon visible but no option to turn functinality on/off in settings. App doesn't work but icon is still visible. Unable to get rid of it.
Help.
Nokia x10
Android 12

And picture https://ibb.co/dtCSyPS

 

[B. Diddy]

Hmm, nothing there that might help.:-\

Does this persist in Safe Mode? https://www.hardreset.info/devices/nokia/nokia-x10/safe-mode/