Hi all, just wanted to type this out to someone in case it helps. I am a noob and don't really know what I'm doing but I set up an account on Mastodon, Pixelfed, Beehaw, and Kbin, then tried finding and following each account with the other.
Pixelfed and Mastodon work great together, they can follow eachother and comment both directions (though I got flagged for suspicious acitivity on pixelfed which makes sense cause my name is the same on each).
Beehaw I can be followed by Mastodon and Pixelfed, but I can't find a follow button in Beehaw to follow back. I can however reply to comments from outside Beehaw.
Kbin I can search for and follow all the other accounts, but I cannot find the Kbin account when searching on the other sites to follow back.
So I don't know if that's confusing or not. Beehaw I can be followed but not follow back, Kbin I can not be followed but I can follow others, and Mastodon and Pixelfed can be followed (but not by Beehaw) and follow back (but not for Kbin).
Sorry I should have made some kind of infographic.