Been trying forever to make the Assistant 2 work with my Mavic Mini 2.  At last, at last I have accomplished the very basics.  Upon recognising my drone, all I get is the link to update or refresh my firmware, as for the rest, diidly, nothing else.  I thought that this would allow me to roll back my firmware and do many others things related to the drone.
DJI has promised so many options with Assistant 2 but all I get is the refresh current firmare!!!  

Hi, there. We are sorry for any inconvenience caused. May we confirm your needs with Assistant 2? Then we will confirm and do our best to help.