I'm not sure. On the one hand, it'd be nice to have official sanction from FFG, especially since (according to the Q/A in the comments) FFG wouldn't have editorial control over what is posted here. But on the other hand, I'm not sure that there is much need for it and a whole bunch of the benefits listed in the article don't really apply here.
As for how to go about it, it looks like Fandom is wanting the wikis to get them a contact with the Studio. So if we wanted to do that here, we would probably need to contact FFG. I might have a way to do that if it came to it (well other than calling up FFG directly), but it's a friend of a friend of a friend sort of possibility. :)
It might be nice to be official if that means FFG is easier to contact with player questions, or if they provide material to fill out the wiki sooner (like card images). Or they may not be interested in doing any of that... hard to say.