Fedora 39 Beta Released With Faster DNF, GNOME 45 Desktop - Phoronix

The headline is wrong. DNF5 (Faster DNF) has been delayed. According to Fedora Magazine

We’d planned to update the DNF package manager to a new, speedier version. We also hoped to showcase a long-awaited refresh to the user interface for Anaconda, our installation program. However, we decided these things just weren’t ready in time.