

For a practical test, search for kbin.social
(and then ctrl+f for it also to get the direct results). Or, just look at a community: !kbinMeta@kbin.social
The only thing that appears missing is the avatars images. Though I assume the text content is doomed in the long-run when it comes to new instances, as I doubt re-federation (3rd-party federation) is a thing. Unless of course, someone manually crossposts said content.
I don’t think I have any federation issues (at least directly), but yeah I don’t get replies probably because what I post is too niche. On 3 posts so far at least (~8 upvotes each) in 3 different communities.
Well, looking back most anything I post is probably doomed this way no matter the instance, unless maybe it’s something more general or eye-catching on a bigger community.