When javaScript calls to navigator.mediaDevices.getUserMedia using {video: true, audio: true } constraints, throws an error:
error: OverconstrainedError
constraint: ""
message: "Invalid constraint"
name: "OverconstrainedError"
Same result when constraints has video: true and audio: false
You can test it easily opening the webRTC github samples:
https://webrtc.github.io/samples/src/content/devices/multi/
https://webrtc.github.io/samples/src/content/getusermedia/gum/
This works fine on IOS16