It is even more complex than that: I do not see PieFed.social in Hexbear’s blocked instances list (click Blocked tab to see it on that page), so if it is true that HB has blocked PS, then it must be on the “hidden list” that Lemmy instances sometimes use to block communities or instances that they don’t like, but which for whatever reason they prefer for that fact to not be as publicly visible (it also allows finer-grain resolution to block only certain specific communities such as Chapotraphouse without having to block an entire instance).
Couple of things:
- HB operates on an allowlist federation model, ie they don't federate until an instance is put on their allowlist by the admins;
- p.s is on HB's
Allowed Instances, so HB should accept stuff and in fact it does; - Lemmy doesn't have a hidden list of blocked instances? I don't know where you got that idea.
