Because they don’t get listed by browse.feddit.de you’ll want to browse https://kbin.social/magazines to browse “magazines”, which is what they call communities
e.g. !RedditMigration@kbin.social
or directly, https://kbin.social/m/RedditMigration
Why YSK: Federation literally just synched up thanks to the tireless efforts by @ernest@kbin.social over the past few days.
Which is exactly why this is better than Reddit. It’ll definitely have growing pains and long term UX warts, but not being siloed and leashed to someone like Spez’s decisions is a really great feature of the Fediverse.