Ah! Cool, thanks for sharing that forum with me.
It looks like this forum is using a couple of tools that NodeBB provides to get content: crossposting and moving topics.
Both those actions "borrow" content from other communities:
[image: 1772472942066-8978c9b5-8580-417e-ba4f-4d1d7d3a7694-image.jpeg]
The good news is that it looks great in NodeBB, you get to see other comments and topics from elsewhere on the fediverse.
The bad news is that the cross-federation of this stuff to other threadiverse software is still not well defined.
Piefed for example, supports topic moving (so, those "world" topics should show up in Piefed), but @rimu@piefed.social @nutomic@lemmy.ml and I have not extensively tested that logic.
Cross-posting is NodeBB-only at the moment, and the three of us (plus the mbin folk) have not started talking about what this might look like between instances.
So that is why that community looks empty for you on Piefed... which is unfortunate, but we're working on it!