Currently no, there isn't a way to see that granular of detail. On my instance I have details about any defederated (blocked) instances. Currently there are none.

But there are pros and cons of joining smaller server. Since mine is small we don't see a large list of communities, I make a point to go through and subscribe to a bunch everyday so my users can get the best experience. But without others doing some of the leg work it can be challenging. Bigger instances like lemmy.world have "seeded" with communities all over because of their large user base. Not only does lemmy.world have a ton of communities but their users have subscribed to communities outside the instance making it discoverable to others.

https://lemmyverse.net/ https://browse.feddit.de/