not sure if this is the correct community to post this in but I was thinking maybe it’d be helpful in some ways if the piefed team reached out to the NodeBB team now that they launched official support of activitypub and are federating https://community.nodebb.org/topic/18545/nodebb-v4.0.0-federate-good-times-come-on
This is coming along - we have https://piefed.social/c/general-discussion@community.nodebb.org and https://piefed.social/c/activitypub@community.nodebb.org working.
The federation that NodeBB does seems to be pretty minimal. Deletes and edits are not federated, for example. Nothing we can do about that at our end.