Servo help? Aux passthrough not working

Hey all, I need some help controlling a servo using a radio. I’ve set up the airframe as Quad Asymmetric and am using the pixhawk mini. I have the servo plugged into main out 5, which according to documentation I found should be aux passthrough 1. When I power on, the servo doesn’t turn on or move at all. Any help or direction appreciated.

Thank you!