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.
When I click those links I can’t really interact with those post without logging in, which I can’t because I’m on Lemmy and kbin doesn’t know me. But when I find those posts in the wild I can. My brain overloades a little bit.
It’s a bit annoying, but I think (someone correct me if I’m wrong!) you would need to paste the link to the kbin communities you want to join or interact with into your lemmy instance (e.g. lemmy.world, lemmy.ml) in the format of !communityname@kbin.social (with the exclamation mark) to see that community as the federated cached version available to your instance. You can then subscribe to the community while viewing that way to see it in your feed going forward. This works best on desktop, or desktop view in a mobile browser.
But yeah ideally links in lemmy would link to the ! link if available, and not the /c/ link so that you stay in your logged-in environment.