Settings for DJI Air Unit to communicate with Furious FPV F-35?

Yes. We have the DJI Air Unit (original not V2). It has nice digital video and good range on the remote and it is a simple package (not a lot of wires and connections). With iNav we had this same hardware working, the remote sticks were seen as RC inputs to the Flight Controller. So it seems like it has to be some configuration problem.