How do I give my team the adequate permissions to build with federated DBs without giving them the "Project Owner" role?

I’m playing around with federated DBs between Mongo and AWS. Is there a way for users who aren’t Project Owners to create and manage federated DBs? I’ve tried giving users every role except Project Owner (such as Project Cluster Manager) but they weren’t able to save changes to federated DBs.

Thanks in advance.