Hey everyone, wondering if I could get some input from people who have more electrical know-how ...

I was looking at this document which has the pin out for TBS fusion. Wondering if it would be possible, using a Raspberry Pi Pico, to wire some panel buttons to a header to change channels on the Fusion, instead of using the joystick? Or better yet, is there someway of wiring up something to replace the joystick completely? For context I'm working on a DIY FPV display, here is the shell so you have some idea of what I'm hoping to accomplish (receiver module will go into the side)