https://fediverse.space/ shows graphs, I think, though currently the page blanks out on me in Firefox. So dunno if they offer the functionality you referred to.
deleted by creator
For lemmy there is https://lemmymap.feddit.de/
A community dedicated to fediverse news and discussion.
Fediverse is a portmanteau of “federation” and “universe”.
Getting started on Fediverse;
https://fediverse.space/ shows graphs, I think, though currently the page blanks out on me in Firefox. So dunno if they offer the functionality you referred to.
deleted by creator
For lemmy there is https://lemmymap.feddit.de/