Oh wow this gets better and better. Someone on HB specifically made the decision to allow all PS content to show to HB users, either not knowing or else knowing that by replying their answers would be shot into the void. Or I guess this is where the idea comes from that it is not even that simple - the PS OP would not see any reply, but accounts on other instances that federate both will. Like a special club of shadowbanned users that can all see one another's comments, but nobody else can!?😜

Lemmy does not have a hidden list of "instances" that are blocked (well, I dunno, but if there is then I am saying that I do not know of it!), but it does give instance admins the ability to block particular communities on certain instances, without acknowledgement of that fact showing up in the instance block list (which makes sense, bc it is not technically the instance that is being blocked, only the communities on them). I know of no way to view this information directly, but I do recall that the capability was announced in the public release notes, which helped explain why at the I was not seeing those communities despite the instance still technically being "federated" (e.g. Chapotraphouse from StarTrek.Website, although since that time I am thinking of STW has fully defederated from all of HB).

Thank you for sharing.:-)