VTOL tricopter setup yaw issue

Hello, this is my first post so pardon the lack of useful information regarding this query.

I have been trying to set up a triplane VTOL build using a matek f405 VTOL board and I am having trouble configuring ardupilot correctly.

My issue is: when I try to do the first hover test in qstabilize mode I don’t have any roll, pitch or yaw control with my transmitter. Even when I try to pitch the triplane while it’s on the ground with an elevator channel input, only the elevons deflect, the motors don’t seem to respond to my pitch up or down inputs.

Furthermore, the tail tilt motor servo to be used for yaw control isn’t being used for yaw stability. However, the roll and the pitch stability are being controlled as they should be.

Any clarity on this issue would be greatly appreciated, and if I can provide more information to help you help me please let me know.