FaceTime Camera, 2017 iMac

[made-in-the-dm]

I am aware that the FAQ's say Macs with T1 and T2 chips are not compatible with CameraController. However, my iMac is from 2017 and predates Apple silicon (as far as I'm aware). The System Information app doesn't list anything under 'Controller,' which should mean (as far as I'm aware) there is no T1 or T2 chip in my Mac, and the FaceTime camera's Model ID says it's UVC. Still, all the camera settings are locked. Why might this be the case? I used Homebrew to download v. 1.4.0.

Brand: Apple iMac, 2017, macOS Big Sur Camera: FaceTime Camera