Lemmy.world doesn't appear to have synced with Lemmy.ca since around 3pm today. (30 nov 2025) It sucks to have server issues on a Sunday and also when world admins are likely on Thanksgiving holiday so it could be tough to troubleshoot.
~~It appears lemmy.ca threads show correctly on .world, which would suggest something wrong on the .ca side.~~
My random guess is a spam rule on the lemmy.ca got triggered or something else went on the fritz, in any case blocking inbound connections?
Update: it appears other servers are having issues with lemmy.world outbound federation.