I think for now it’s just xbox controller, mouse, keyboard and hotas one with optional pedals. I use it with hotas one, optical mouse and keyboard with controller off most of the time.
There may be more supported at some point, but given the recent stir with hotas one bugs (which for most part are minor as it is totally usable for flying with as is) it may be a while. There surely must be a yoke system planned at some point down the line.