Oh no. The rebrand is not done. There is no Atomic site yet, Atomic= Fedora Desktop with OSTree (Silverblue, Kinoite, Sericea, ...)
If you like GNOME, yes I recommend Silverblue a lot.
Fedora has a very different system of the core distro. But with defaults I mean that they dont have apx by default but the same underneath.
You could use a bash function for DNF for example, but in general it is
distrobox-create Fedora39
distrobox enter Fedora39
sudo dnf install PACKAGE
distrobox-export --app PACKAGE
for GUI packages