Oh, I know what the issue there is. Apparently because Kbin is based on an older version of the ActivityPub protocol, when Kbin magazines are synced into Lemmy, posts from before the magazine was synced don’t show up. The only posts that show up on Lemmy are ones made after the magazine is synced, unlike the way it works between Lemmy instances where everything is synced all at once. I’m not sure if there’s anything the Lemmy devs can do to fix this. It might take Kbin switching to the latest version of the ActivityPub protocol for this to stop being an issue, but I’m unsure if the Kbin devs are willing to do that. They seem to be focusing on getting their API out right now.