I use a Logitech C930 webcam at home and at work. When using my Linux setup at home, the camera always appeared “off” compared to when using it on my work Mac. I finally dived in to tweaking some of the settings to make it work better for conference calls. This blog post is a great way to get started:
https://jeremyeder.com/2020/04/24/tweaking-my-webcam-setup-logitech-c930e-fedora-linux-v4l/