Safari didn't support WebRTC until 2017. iOS doesn't support third-party browser engines, and third-party browser apps (i.e. embedded web views) have issues because... they haven't figured out the UI yet.
Safari also doesn't support service workers or the fullscreen API.
> WebRTC for videoconferencing is not supported for third-party browsers because Safari displays a prominent UI to make sure the user knows when a website is recording using the camera and microphone. Apple does not yet have a way to make this UI work in other WebKit clients.
That's a far cry from what you're insinuating.