It would definitely be useful. In Peter's defense though I don't remember the accessibility issues existing before Big Sur. So it's a rather new issue to have to grant access again.
Yes, this is new. Some users find that after updating to Big Sur or Monterey, some part of KM is not functioning correctly.
Peter commented that KM 10 has some improvements in that area though
I was just trying this and agh!
I must have gotten the hot key wrong because what I clicked (like 5 minutes before a Zoom meeting!) turned my external display into mirroring my main display. Somehow I got out of it.