I'm using my retired Samsung A5 Android phone's rear facing camera connected via USB to my PC using DroidCam (costs a few bucks). DroidCam also does wifi, but I find USB to be better.
The quality is pretty good from the A5, but if I need even better, I use my current phone's rear camera outputting to HDMI to an El Gato CamLink using Filmic (which outputs clean HDMI on Android or IOS, but isn't cheap as DroidCam). Filmic is definitely a step up from DroidCam, but fussier in terms of getting set up.
It's been a while since I used it, but IIRC, it seemed OK to me when I tested it, but you can always try lowering the resolution to reduce the latency.
The quality is pretty good from the A5, but if I need even better, I use my current phone's rear camera outputting to HDMI to an El Gato CamLink using Filmic (which outputs clean HDMI on Android or IOS, but isn't cheap as DroidCam). Filmic is definitely a step up from DroidCam, but fussier in terms of getting set up.