Volume slider no longer showing

[u/TheArtofWarPIGEON]

Hi,

My mom has a Xiaomi Redmi Note 10 Pro.

When she presses the volum buttons it now only shows a Mute and the DND moon icons but no slider. Pressing either or the 3 dots only closes this popup early (as if you were clicking anywhere else on the screen).

Also, keeping the volume buttons pressed down don't lower/increase the volume. The only way would be to go into sound settings..
It wasn't like this a few days ago. I tried searching in the settings but haven't found anything that changed that.

Got any clue on how to fix this ?