The site: https://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:
Or you can just open this link: https://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:
I know the wefwef webapp supports importing the Apollo app’s exported .JSON and uses one of these services to suggest communities.