I’m not sure if we’re not straying from the topic. However, if the suggestion is to use a camera, I would recommend a phone.
For example, we can install DroidCam on both the phone and the computer.
We need sudo eopkg it v4l2loopback-current
.
Then run: sudo modprobe v4l2loopback devices=1 video_nr=10 card_label="Virtual Camera"
Finally, launch DroidCam on both devices. Tested on Teams.

The picture isn’t very good. This one happens to be IriunWebcam, but DroidCam works the same way. The basic version of DroidCam for Android is limited. The Pro version offers more features, but it’s paid.