I have a Futaba 14SG which has Sbus, it would be still required to use the XR8 receiver with pixhawk 3 pro?
Do you mean X8R receiver?
Sorry yes X8R receiver
You can use what you want such as PPM and SBUS receiver.
So, the Futaba is compatible with the X8R receiver and Pixhawk 3 pro-PX4?
The X8R receiver is Fr-sky and I don’t think it will be able to work with your Futaba.