AFAI understand it needed a HW change in the PCB to get this to work. So its a no go for the J2.
As for the SW side it needs a compositor that supports external displays. Quite a big tast. Imagine it took them ages to add xdg-shell so we can run more toolkits on the phone. And while this improved (or will improve things) having a modern compositor is a different level.
Don’t have high hopes on it.