Yes, you will be left with your 9020 with a sattelite to use separately and you will have all channels into your flight controller where you go to radio setup to configure switching thresholds for multi position switches, and configure min and max values for sticks and sliders.
The satellite rx are full range receivers, but you will not have the multi path diversity that the 9020 offers. But this shouldn’t be a problem for normal rc range flight.
I use this method to manually fly takeoff and land, then i change to rtl or loiter while i connect my transmitter to usb cable where i then use the joystick function to continue controlling the model from GCS with a longer range link.
I disable the rc loss failsafe so that the controller doesn’t return the model as soon as i turn off the transmitter in flight
What kind of craft are you installing the flight controller into?