I'm a huge long term lurker but wanted to share a solution I found to my webcam woes for anyone else in a similar position for work or otherwise and who have an iPhone.
I needed a webcam for work and with very sparse availability both online and at local retailers- I came across a solution with OBS using an iPhone app called Camera for OBS Studio and a plugin in OBS VirtualCam. It has two options, one over WiFi using a plugin called NewTek NDI which in my opinion was absolute rubbish for latency unless you set a high frame buffer. And USB being the second option with an OBS plugin from the app developer.
I definitely recommend giving it a go. It was a bit pricey at $15.99... quite possibly the most I have ever spent for an iPhone app but given the current situation with webcams, better than nothing.
I wanted to share but also see if guys maybe have found free alternatives or better options?