Yes, it is just disabled. Lemmy Federate supports every threadiverse software and Piefed is one of them.

Currently Piefed communities can be followed by Lemmy instances but not the other way around.

In general, every fediverse software that support FEP-1b12 and can receive Lemmy-like PM’s can register to Lemmy Federate.

/cc @OpenStars@discuss.online @rimu@piefed.social @julian@community.nodebb.org