I started with Droidcam during the pandemic and switched to Iriun. Currently using it with an old iPhone SE over USB, but also used with Huawei P20 Pro. Not many features, but just works.
I used iriun a lot, a problem that I have with it is how much my Samsung phone heats up when using a higher resolution. Probably a Samsung/Android problem more than Iriun. I would love to have a phone quality camera in a regular USB webcam.