Not to be too much of a pedant, but I think the messaging is important: it's not about how many moderators, it's about moderation tools. Lemmy's are a little too rudimentary for what they want.

Anyway, refederation would entail taking lemmy.world and sh.itjust.works off their blocklist. That would allow users on those instances to subscribe again and comment/post. That part would be user-initiated. Then on the Beehaw side, they'd have to subscribe again to lemmy.world and sh.itjust.works communities. That part would also be user-initiated.