Is there a way to populate an magazine with posts from before the first person on an instance subscribes to it?

I recently subscribed to pensandpaper@lemmy.ml on kbin.social. I was the first person to do that as it was clear that the kbin copy was created with me clicking subscribe. It's not a very active community with only two old posts but the only way to see those is by going to the original instance that it's hosted on.

Is there a way to pull those two posts to the kbin version of that community? Or is it inherent to the Fediverse that things only start syncing with the first subscription on an instance and it's not retroactive?

Let me know if there is a better place to ask this question.