I think those glitches work because some menu interactions slow the game down intentionally (for like half a second) and players have found ways of abusing the slowdown’s interaction with game physics. So I don’t think framerates are relevant to that, but I may be wrong about that.

Doom Eternal had similar glitches where the weapon choice menu slows time down to let you make a selection, and you can abuse that slowdown by spamming the jump button to launch yourself really high. I believe speed runners bind the mouse wheel to jump so they can super launch themselves.