Why does this community need '@lemmy.ml' even locally?

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Major League Rugby - Lemmy

https://lemmy.ml/c/usmlr@lemmy.ml

Community to discuss US Major League Rugby [https://www.majorleague.rugby/]. Schedule [https://www.majorleague.rugby/schedules/] Standings [https://www.majorleague.rugby/schedules/] The Rugby Network [https://therugbynetwork.com] 1. No spoilers! See here [https://join-lemmy.org/docs/en/users/02-media.html] for how to spoiler tag in posts

Major League Rugby - Lemmy

Going to https://lemmy.ml/c/usmlr gives a 404, but https://lemmy.ml/c/usmlr@lemmy.ml works.

There's also quite a bit of lag in federation, with most other instances not even having the last changes I made to the description. Only lemmy.world does, but I also moderated and post in the community from that instance, so that may be why.

I would assume beehaw simply won't receive the posts I make from my lemmy.world account, because defederation.