NewPipe is the way to do that on android...

Smarttube on Android TV's works exceptionally well, too. I've seen people recommend Tizentube over it because it's nearly indistinguishable from the standard YouTube app, but with adblocking--but I actually prefer the more minimalist UI of Smarttube.

is there something for IOS?

My solution is to watch YouTube on brave browser.

Yup. Astounding how many tech people just fork over money to an evil company instead though.