Control a servo based on guided pitch commands

I’ve been working with an Eachine 180 Tilt Rotor. This quad uses a servo to tilt the arms so that you can achieve forward and reverse movement without pitching the vehicle.

My first attempt was to replace pitch control with the tilt control and I was having this issue where the vehicle would pitch the opposite direction of the tilt to compensate. So I decided to reintroduce pitch command and use radio mixing to combine both the servo and pitch control, pushing forward on the stick will tilt the motors forward and also pitch the vehicle forward. This works great, the vehicle stays level while the motors tilt to control movement.

Now what I’d like to do is write a LUA script so that I can use this functionality in guided missions. I want to read the pitch commands that the autopilot is using and use that to control the servo. I’ve searched through the LUA doc and haven’t been able to find a value that will show me the pitch commands given by the autopilot. Is this data available?