Some smartphones, like LG G5/G6, have dual back cameras - standard and wide(fish-eye) camera. Current implementation correctly gather info from android part, but select the same name for both cameras in multimedia plugin fro android.
Selecting a second camera will always switch to first camera(QCameraInfo->name return "front" for both cameras), so no way to access it.

STR: run QtWidget or QML Multimedia Camera example on dual front/back camera smartphone