Best Streaming App?

[ElYubiYubi]

Hi guys. I was looking for a good app that let me have a PIP of the camera while recording or streaming games. But I dont wanna use the Phone's camera but a USB one. Also let me use the Mic on my Headset instead of the one on the phone or the one in the camera. That would be so easy to setup on Windows with Streamlabs or xSplit but I dont have a PC only my Phone. I thought that would be easy to do on Android considering that a LOT of people stream from their phones(Directly) but even Streamlabs on Android dont have that feature.

Also dont know why still its not possible to stream or record with internal audio.

Any Help?