No, it's not central. Discoverability of the entire universe is not a goal of any fediverse tool; the goal is to put back communities in the hands of users. Diackverability happens by talking to people, asking your way around, following interesting accounts from afar, being part of the discussion and organically grow your network.

If you search for Twitter2, the fediverse is not it.

Every IRC server or Discord server I ever joined, I joined because there was something there to which I wanted access, or an existing community I discovered another way, and was directed there to fill things out.

If either of those things exist for mastodon, I'm not seeing them, and half the people on here are saying, "this isn't twitter go away" while the other half is raving about how exciting it is to be the recipient of "#twittermigration"

Which is all very cute, but it does tend to give commenters whiplash, not knowing whether the responses they're going to get are going to be from one side or the other, or both!

Maybe the things you are interested in do not exist on the fediverse; it's not a problem in itself. It's better to be there than on Twitter, but so be it.

Both replies absolutely coexist because of something simple: the fediverse is not Twitter. If you're looking for Twitter2, that's not it. If you're looking to build the fediverse by being a member and contributing to the discussion. You're going in a different universe, learn the rules :)

It's not a goal of any current fediverse tool. More advanced discoverability will come. It's not hard to e.g. ask instances to opt in to relays or crawl for profiles. It can happen the easy way (cooperation on a non-commercial solution) or someone will build some ad-supported hellhole to do it once they think the traffic would be worth it.