I know this just from a Twitch streamer I watch. He'll occasionally have to stream with the camera off because having the camera on takes a lot of energy
I feel bad about it, used to have the stand up scrums and then just disappeared behind a computer oh well, been like that over a year and a half now. Only 1 out of say 10 people have their webcam on now used to be more early on.
Having the camera on is not a requirement for doing actual work. It can be nice to see your fellow coworkers, but it's no substitution for an actual physical meeting.
Having worked both in a remote and office setting, i much prefer the latter as it makes for better relations and getting to know people.