Fedora setup

Nothing stops you from taking the card out of a running PI and dding it to a file...and then cloning it endlessly.

comes to nearly the same thing. Since Raspian has a preconfigured user, all you need for an Ethernet Pi is IP address setup and ssh enabled.

If its wifi, then you need SSID and passkey as well.

Once you have ssh access setting up a better user, negotiating proper ssh keys, making sure date, time and locale are all configured - is not hard

You could probably hack a fedora image to do that as well. Almost certainly, the 'first time boot setup' is some sort of script that could be disabled

And having done that and booted it once, you could clone the setup for next time...