I think they are still federated with your instance so you shouldn’t notice a change.

I think how it works is your instance is lemmy.world you can see the Beehaw subs and comment and I will see it being since we are on the federated instances, but their users and mods won’t see your comment since they aren’t pulling in lemmy.world data.

It will mostly be a problem for Beehaw accounts because if they were subbed to c/gunners then they will not be able to see the sub anymore.