Yesterday, I upgraded my F38 Asahi Gnome install to F39. I’ve had installed telegram-desktop from RPMFusion repos, and I also had a package installed manually which required python 3.11 (and was not in any repos). Since telegram-desktop in RPMFusion wasn’t built with latest qt6 packages, I needed to use --best --allow-erasing options when upgrading, and also I removed my custom package before upgrade. With these two, I upgraded successfully to F39.
After updated, I installed telegram-desktop from RPMFusion repos, which downgraded Qt6 packages to be compatible.
There was also something, which was not problematic: for whatever reason (I didn’t spend time trying to figure out why), when upgrading my kernel-devel package was downgraded to some old version (IIRC, to kernel-devel-6.3.8), but after upgrading to F39 I ran dnf update and this package was updated to latest version without any problems. Don’t know why it happened, but it was harmless.