Because there's so many new fedizens I will share this site for finding communities that are on lemmy and kbin. ( lemmyverse.net )
The site: lemmyverse.net/communities
To see kbin “magazines” (that’s how subreddits/communities are called on kbin) you have to switch to displaying them in top right corner:
https://lemmy.fmhy.ml/pictrs/image/ade75e80-6bcc-4955-b3b5-1ac9770ca305.png
Or you can just open this link: lemmyverse.net/kbin/magazines?order=followers
And to go back to displaying lemmy communities you have to press on “communities” in the middle on the top of the site:
https://lemmy.fmhy.ml/pictrs/image/e3d56a1f-53d6-44ae-a187-06b4970b14f8.png