Ok, can you give me some links of stuff that you can’t find here? I found all of the older posts mentioned in this discussion, which means they’re federating fine. However, it could have been my search for them that triggered the federation. In which case, it might be worth just unsubscribing from the group and re-subscribing. Lemmy federation doesn’t send content for groups with no subscribers on that instance, so if you’re the only subscriber and that subscription request got lost back when you first subscribed (when lemmy federation was less developed), that could explain it.