Yeah. I have no idea how to follow SocialHub discussions Mastodon account. I see this post because I'm following you, but it's disembodied -- I don't see the rest of the thread. And I can search for @community@socialhub.activity.rocks but its profile is empty.
Not only that, If I'm reading it over there, and see something I want to reply to from here, doing the "copy this URL" trick doesn't work. Does that mean I'm not in the fediverse??? Hard to know, but in any case I haven't yet figured out how I can participate in discussions there except by replying to somebody I follow.