From mobile phone to OBS - iOS?

Would like to stream a mobile game on Twitch. Theoretically, only on the mobile phone via Streamlabs would work, but would like to get my mobile phone screen in OBS so that I can stream there. How would that work?

What do you mean by OBS?

Open broadcast studio

You mean Open Broadcaster Software (OBS) Studio.

There's OBS Studio for macOS, I'm not aware of that for iOS.

I'm aware. However, you can somehow transfer your iOS screen to the PC so that you can transfer it to the stream in OBS.