Need Help Connecting QGroundControl to a PixRacer Pro

I am new to PX4 based autopilots and I am attempting to configure an mRobotics PixRacer Pro through QGroundcontrol. First step is to install the firmware, but there are no firmware options listed under PX4 and there is only a single Firmware option listed under ArduPilot. I can install the ArduPilot firmware but doing so will result in a “QGroundControl does not support your current vehicle type” error. Does anyone know how to resolve this error?

Thanks for the help.