I'm guessing the code of conduct primarily concerns the software development process?
Doesn't seem so:
> If a community member engages in .... up to and including expulsion from all Funkwhale spaces
IIRC you can't just kick out an instance from a federation by switching a button?
The maintainers have no power over federated instances. The code of conduct is pertaining to the repository and official Funkwhale communities (such as the Matrix chat and discussion boards).