It's been like that since Fedora 31. At least with the netinstall everything iso.
Gotta be the Netinstall because we install this constantly, every few days, and in the Server Edition, it's not there by default.
root account is disabled with the following ISOs:
Must be in 1.9. We do these constantly and haven't seen it yet.
Was there more than one ISO release of Fedora 31? There is not always.
Not sure. I just looked and we are on the 1.9 ISO and it definitely has a different default.