Are there still federation issues? (Almost all content missing in some communities)

So I subscribed to a Lemmy community earlier, and according to the site there are three subscribers to that community here on Kbin, yet content is not showing up here.

Original instance: https://sopuli.xyz/c/progmetal/data_type/Post/sort/New/page/1
Lemmy.world: https://lemmy.world/c/progmetal@sopuli.xyz/data_type/Post/sort/New/page/1
Kbin: https://kbin.social/m/progmetal@sopuli.xyz/newest

The former two seem identical as far I bothered to check, with 10 posts in the past 20 hours, but Kbin only has one of them (and it's not the oldest or the most recent, either, but the second oldest).