We can use keystrokes to copy and paste in Notes, but it seems that most (all?) fields do not allow it, we have to use the mouse to choose Right Click Copy, Right Click Paste. My request would be to allow keystrokes everywhere. Or as many places as technically feasible.
I notice that after the update (22.214.171.124, 7 Mar 2023), Ctrl-V now works in fields. Since they fixed that, I’m assuming they also fixed Ctrl-C, Ctrl-A, Ctrl-X, etc.