There is a workaround to use UVC on QGC . Try to install USB camera connect EasyCap .This app can route an UVC video to RTSP streaming. I successful tested with an OTG receiver. QGC support UDP/TCP/RTSP and work fine. The problem is that QGC is not a native Android application but is compiled from a cross compiler platform ( QT framework )
As @DonLakeFlyer said, some work e some doesn’t…