Virtual interviews w/ cameras off

I’m wondering how common this is. I had an initial interview with a recruiter virtually, and we were both on-camera — as I expected we would be. From there, I had three subsequent interviews with different people/teams, all virtual. Of course, I had my camera on, but in all of those interviews, everyone had their cameras off and the only thing on the screen was a little bubble with their names - not even a photo of the person/people! It was odd and off-putting, being the only person visible on the screen and being unable to view their facial responses. Is this typical? I don’t interview often.