The webcam straight up doesn't work on ubuntu and debian, which are supposed to be supported. I've tried multiple things from around the web ("add this apt repo", "enable/disable this kernel module", "use this git repo with dkms", ...) and consistently ran into issues. Now I just use an external camera.
Other people around me with the same or similar models had the exact same problem and there are many posts online about Dell's weird camera choice. It sours the experience quite a bit, IMO.
Tuxedo Computers has been a painless experience for me. Even got a relative one and after updating, everything works without issues and has been for a while now. Haven't heard any complaints.