Yes but it's apparently a little complicated. https://support.zoom.us/hc/en-us/articles/115005890803-iOS-S...

Teams also supports this well.

I kind of assumed it wouldn't work well before trying it, perhaps due to the lingering "mobile devices are low powered devices" stigma. In reality my iPhone can run full AR apps (meaning running the camera and a 3D rendering engine) and stream them to a Teams meeting without breaking a sweat. I wasn't even anxious about plugging in.

Ah yeah, I forgot to mention that I'm on linux, and iPad direct to Zoom doesn't appear to work there. Also, going through OBS lets me do scene switching between full video, slides, and whiteboard, the latter two with video overlay in the corner.