Hey, that happened to me, too!
I got scheduled for a mandatory meeting with 1 hour notice. During lunch.
I asked my boss what it was. He didn’t know either. I joked that it was us being shut down.
Sure enough, 1 hour later we were both writing LinkedIn recommendations and helping each other find jobs after it was announced that our whole studio was being shut down by corporate and myself plus all my coworkers were all now jobless.
I didn’t see you were on a different instance - each community needs to be manually added to your instance’s federation list. Lemmy doesn’t federate the entire instance - just individual communities. You only see communities that have at least 1 subscriber local to your instance - no subscribers, no federation.
If you go to dmv.social in a web browser and you type https://kbin.social/m/wizardposting
into the search bar on your instance, you’ll see it pop up in the search. Then you can subscribe to it on your instance and the community will start federating because there’s 1 subscriber on your instance (you). You won’t see any past posts from before federation, but you’ll see future ones.
They work fine on the actual Lemmy.world website as well as in Sync for Lemmy. Might be a bug with Memmy.
Bookwyrm is a Fediverse alternative to Goodreads. :)