@gaditb You asked for clarification, and I gave you an example of the kind of diagram I meant, from https://www.britannica.com/technology/fediverse .
There are a lot of others. This is not an unusual way for people to diagram the Fediverse. Here's the one from Wikipedia.
https://en.wikipedia.org/wiki/Fediverse#/media/File:A_view_into_the_Fediverse.png
I think the people who made these diagrams intended them to be diagrams of the Fediverse, which is why they labelled them "The Fediverse".