It's not necessary to have your camera on at all times when you are on a video call. If I join a call with a friend, and all I want is to just look at them screen share their computer screen.

A good solution would be the ability to turn off the camera like on various other call apps like element, Jami, jitsu meet etc.

Trifa version 1.0.171
f-droid version
Android 11

For the time being, I just use element or Jami. Since they give the option to turn your camera off in a video call.