I mean it’s not only alike what you’re currently using… It’s the foundation of Ubuntu. Lots of packages are exactly the same.
And I think you’ll find something very similar, just with the stuff missing that Ubuntu added on top, and you don’t like anyways.
Hope you can move you containers and volumes without too much effort. I mean since you’re starting over anyways you could also pause for a minute and think if you want to recreate something similar or switch to something different. There are other containerization techniques, podman, systemd-nspawn, you could do your server in a declarative approach with NixOS… But if you like what you have now, and don’t want to learn something entirely new, I’d say Debian is probably your solution.