Yes ig
Has there been a UTT tourney where the one who got first place got 10/10

Ex, btw its a cheater https://www.chess.com/tournament/live/untitled-tuesday-1776850

https://www.chess.com/tournament/live/untitled-tuesday-november-2017-906901
so this is the only one who got 10/10 but didn't cheat

It's basically suicide to cheat in UTT. Attracts almost as much attention as cheating in TT.
@RichyNix played only a few hours of blitz chess on chess.com (and only slightly more hours of bullet).

Here’s a 9/9 with some strong competition:
https://www.chess.com/tournament/live/saturday-event-october-2017-901199

I thought UTT had 10 rounds tho
it was intended to mirror titled tuesday, which used to have only 9 rounds.
titled tuesday has now changed format again to 11 rounds, dunno if admins are minded to follow that change

dunno why no one posted this one https://www.chess.com/tournament/live/saturday-event---june-1071569

It's happened a few times. Cheaters occasionally do it, and usually get banned shortly afterwards. It's very rare for a clean player to do it, but it's happened.
^^^
Just wondering