code.forgejo.org vs codeberg.org

The difference between forgejo and codeberg.org is clear. Forgejo is the software and codeberg is the entity that owns it, provides the domain name, etc. and also hosts a public forgejo instance at codeberg.org.

Lately, I've seen that there is also code.forgejo.org, which I assume is run by the same people. Why are there two public instances run by the same organisation? Are users supposed to migrate from one to the other? I see that code.forgejo.org currently has version 11.0 deployed which afaik is not released yet, so is that instance just for testing purposes?