I noticed that some communities on lemmy.ml are unable to be seen on other instances. For instance, federating the lemmy community works fine:

https://sh.itjust.works/c/[email protected]

But federating the kubuntu community returns 404: couldnt_find_community:

https://sh.itjust.works/c/[email protected]

I’m certain that second one should work… I’ve found perhaps two dozen other communities that have the same problem. Meanwhile, dozens of others work fine.

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Edit: @[email protected] suggested I try searching for the community first. I had actually tried this but it didn’t work, which is why I started trying the deep link approach above; that worked for some communities.

Turns out the deep link by itself will not discover new communities, only searching for them will, and the search can take a long time and will show “No results” for a little while.

So if you’re experiencing this, search instead for !community_name@instance.host from the remote instance, then the deep link will start working.