Koven! is a user on social.coop. You can follow them or interact with them if you have an account anywhere in the fediverse.
I made a flow chart of which Mastodon posts end up in which timelines!
So, you can see how each instance will have a different local timeline, and even a slightly different federated timeline - and you can see why the federated timeline moves so much faster than the local one, too.
@cassolotl This is a helpful thing that you made. Thanks!