Sorry I am on a train with FA else to do.
Source: https://www.dailydot.com/debug/mastodon-fediverse-eugen-rochko/
There's an interesting aspect that due to decentralisation there are many fediverses. For example my home timeline is so heckin political and our instance is generally aligned around the term libertarian socialism.
What is clear is that there isn't a hegemonic fediverse. It is much more...o wait...decentralised