Pixhawk 6X Wiring Issues

I’m designing a fixed-wing drone using a Pixhawk 6X flight controller, but I have a couple of questions regarding the wiring of multiple servos through RSSI/S.Bus out port. Our fixed-wing drone could contain more than 8 different servos/solenoids, but I am not sure of different ways to connect these servos together through S.Bus ports. Does any of you have any suggestions on how these servos can be connected or if there is any source I should look into?

Also, are there any suggestions on picking the correct S.Bus receiver for the RC-in port?