I thought undo is “violently shake the phone”

Late to this thread - while 3-finger tap pops up the text editing menu, you can undo with a three-finger swipe from right-to-left, and redo is left-to-right. Also if you have something highlighted you can do a 3-finger pinch-in to copy, do it twice to cut, and the reverse (pinch-out?) to paste.

I learned the three finger trick recently. I’ve been shaking to undo this whole time.