VTOL Pusher ESC Calibration

I am using the Generic Quadplane VTOL configuration and I can’t get the pusher motor to function properly as it doesn’t want to calibrate when I go to the Power tab for calibration. Performing a bench test and transitioning to forward flight, it just sits there beeping as if nothing happened. I have it plugged in A5 and have tried swapping it with an ESC and motor that I know are functional but that did not solve anything. Servos and vertical motors work just fine. The pusher motor and ESC are the same kind as the vertical ones. What is the proper way to calibrate this pusher ESC on A5?