Just yesterday I wanted to simply take the first frame of one of those stupid "motion" photos (that someone else took, but could have happened to me given the weekly UI churn). I tried really hard, but it's just not possible.

What I did find was many, many different buttons and icons that start some kind of AI magic enhancement crap.

Pull up, tap on "shots in this photo", scrub to the left, tap on "save copy". It seems fairly straightforward to me.