I noticed an unexpected behaviour today. If you type an application that isn’t installed and then get prompted to install it (by Packagekit?) then dnf4 gets used to do the install. See screenshot below.
I had a lingering feeling something like that could happen with dnf non-root and always took the package name from cnf right to sudo dnf
I notice this too on F41 Workstation (updated live respin) clean-install with vdpauinfo (dnf install vdpauinfo; shows under dnf4 history but not dnf5 history list; no sudo use)