It's called CODE in nextcloud which stands for Collabra Online Development Edition and it is integrated in nextcloud. It isbfor sure a thing. Don't try to confuse me more lol.
I'm no lawyer but I don't think the AGPL says you must use the same branding in a fork, in fact most hard forks tend to prefer changing it in my experience, as the original branding might be trademarked and so they can't legally use it themselves without permission, and/or they just want to distance themselves further from the parent.