Based on this comment:

There are some anomalies in the federation between Lemmy and NodeBB. In the past, I noticed that Lemmy only federated communities/categories where at least one Lemmy user had started a conversation. Yes, I know it seems like magic, but I imagine there is a reason for it…

If what the comment said is accurate, it would be an issue if I want to subscribe to a category where I"m not supposed to create a new topic.

    • molave@reddthat.comOP
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      5 days ago

      Speaking about the instance I’m in and specifically with respect to [email protected], I’m subscribed to it. So far, I only see posts that a Lemmy user or a user local to the category/community’s instance has authored.

  • nachitima@bridge.nachitima.com
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    6 days ago

    My guess is that I couldn’t see them because the OPs are from Mastodon-like accounts.

    This might be the reason. Lemmy has limited support for Mastodon-style Note objects as top-level posts.