Have been having the Camera issue for the last 6 months for the Surface Pro 7, 7+, and 8 models. We use Surface Laptops as well but that never occurred in the models.
We have done all the troubleshooting methods such as reinstalling the camera, latest updates, and latest firmware, running the SDT scan, running the system scan for compromised system files, obviously multiple restarts, and checking app permissions, installing Win 11. We have experienced that some of the devices were fixed and some were not, and some occurred after a short time.
Some devices find an error within the SDT report but are also unable to export the report. This may be related to your domain -- that's what we were told --.
We logged the issue with Microsoft but the answers we get are quite funny. They are expecting us to reset the Windows while users are from the interstate branch and while they don't have replacement devices there. You'd expect a wiser diagnosis from them.
I'll be happy to send the devices that are having the issue currently -- as we just got reported for 2 devices only today -- to Microsoft, so they can investigate and provide solutions to Businesses and individuals.