Guess, that SBUS-Servos has to be connected to the SB-Port. Well, they do not work.
I have 2 pwm Servos on Channel 1 and 2 and to test SBUS, I connected also 2 SBUS Servos (parallel) to the SB-Port. I use FrSky-SBUS-Servos. One is setup to Channel1, the other to Channel 2. The Servos are working at the corresponding channel, I checked this with a X8R-Receiver where I connected the Servos exactly the same way.
By the way, also a X8R is feeding the pixhawk and the pwm-servos are moving correct.
Do I need to enable somewhere the SB-Port?