What's is that

[jcDavid12]

S21 ultra 5G 

[moe]

All I know is that it goes away after a while.

[userATVrfLFSHy]

Check accessibility settings

[USBetaModerator]

Hello @jcDavid12 ,

That is an accessibility button. You can turn it off in settings -> accessibility -> Advanced Settings -> Acessbility button -> Select Actions -> None.

Regards,
OneUi Beta Team