I can bust out a Pi and try manually. But that’s about all the help I can offer as my ARM game isn’t quite as strong as yours, with the most powerful ARM thing in the house being an M1 MBP 14".
The Ansible portion however is something I’ve been looking forward to from you. I’ve tossed around the idea of an Ansible driven NAS, as well as looking at NixOS.
IIRC, the cockpit-zfs-manager package is now helmed by the 45Drives team, and the original project has archived since. So, sad to say that you may hit the same roadblocks there.
I like Rocky, I actually grew to like dnf as well. However, I just feel much more at home with an apt and Debian based system. May want to poke at ryanmandle05’s work on Ubuntu 22.04.