Does iPhone Safari browser support WebRTC technology?

Unfortunately iOS browsers do not support WebRTC technology.

So you can’t use microphone or webcam in iPhone Safari browser. It is policy of Apple.

You can

1) Playback WebRTC stream on your iOS Safari browser, for example via WCS5 server as a Websocket stream, because iOS Safari fully  supports Websockets.

2) Playback WebRTC stream as HLS.

Anyway, WebRTC stream should be transformed to a stream readable by iOS Safari such as Websocket stream or HLS (Apple HTTP Live Streaming).

The Websocket stream has a lower latency than HLS, that’s why it is recommended for real-time applications where latency is important.