Missing MPC_xx parameters

I want to use a new airframe configuration that I added to the firmware (v1.11.1) following the instructions of Adding a New Airframe Configuration. After flashing the controller with QGC, when I go to the Tuning section, I get this:

Checking the Parameter Reference, I realized that almost all the MPC_xx parameters are missing. How could I add those parameters to a custom airframe?