It’s really annoying and is messing with me

I want to buy flagship phone is there any ads in xiaomi’s flagship models?

whenever i switch to a third party launcher, and i long press a window in the recent app screen, the ui becomes bugged. these buttons just dont show up (the app pin button as well) and i cant swipe or ...

it popped up suddenly last week or so i thought i was dreaming because it never showed up again but today it did again and i interacted with it so i knew for certain that i wasn’t going insane but ...

About a month ago I’ve noticed an unfamiliar slider near the sound one. Kept bothering me since. I want to know that that is, and how to turn it off. I’m on realme UI 4.0.