I did, the Magazine now shows up but posts aren't syncing completely. Yesterday, no posts were showing up over at lemmy.world. Today, there's a few, but there are also posts on the Mag from Lemmy that aren't here in Kbin. Not sure how to moderate those.

Thank you! I can see it now. Not sure what the problem was, I'll try this strategy now. Still, threads are not syncing up correctly.

It appears there's some truth to this. Threads from Kbin after the Magazine started appearing in Lemmy are now showing up there correctly, if after a bit. Even one I posted a day before the Magazine was available there. However, there are still posts from Lemmy to the Magazine I moderate that are not showing in Kbin, I have no way of moderating them. This is creating issues since there are duplicate posts (it seems to be a bot reposting threads from Reddit).