Steps to reproduce:
Launch Minecraft on iPad Pro 12.9” connected to iPad Magic Keyboard
Go to Settings and try to set Keyboard keys
=> None of the options can be set, keyboard does not work at all
Start playing
Try to use iPad Pro Magic Keyboard (incl. touchpad)
=> Does not work at all
Issue is related to MCPE-72058 which got closed as duplicate of MCPE-51263.
Please note this issue was NOT fixed by MCPE-51263!
MCPE-51263 has been resolved as Works As Intended, which means that this is not a bug.