HITL output on real plane

I would like to have the real outputs in gazebo and on the real servos.
It is the same thing as in that post. HITL output to real servos? and Turn off lockdown in HIL?
However, the proposed solutions don’t work for me.
Additionally, I used the px4io lockdown disable command. Even though the software states: WARN [px4io] WARNING: ACTUATORS ARE NOW LIVE IN HIL! nothing is live. (And yes, the servo rail is powered.)
Has anyone already tried this?

Best Regards