I’m running a mix of Debian, Ubuntu, and Arch on my servers/VMs. All are fine. Having to set up sudo on Debian was a bit annoying, and having to get rid of snap on Ubuntu too, but after that you get a lot of benefit out of the Debian/Ubuntu defaultisms in many guides (and Docker is there to pick up the rest).
If you can maintain Arch, you’ll have a breeze on either Debian or Fedora. There are a few command line tools (apt/dnf and such) that you’ll need to get used to, and it’s possible that certain directories are in a different place, but that’s about all. With unattended-upgrades and scheduled reboots, your interaction with the server should be minimal.
Don’t do Arch unless you like scheduling maintenance.