https://bugzilla.redhat.com/show_bug.cgi?id=2054680
--- Comment #3 from Jens Petersen petersen@redhat.com --- (In reply to fujiwara from comment #2)
There is no GTK4 applications.
Well in Fedora 36:
$ rpm -e gtk4 |& grep libgtk-4 libgtk-4.so.1()(64bit) is needed by (installed) libadwaita-1.1~beta-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-bluetooth-libs-1:42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-bluetooth-1:42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-desktop4-42~beta-3.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) xdg-desktop-portal-gnome-42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gtksourceview5-5.3.2-3.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) baobab-42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-tour-42~beta-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) colord-gtk4-0.3.0-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) libnma-gtk4-1.8.34-1.fc36.1.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-control-center-42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-shell-42~rc-2.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-contacts-42~alpha-2.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-calendar-42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-calculator-42~rc-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-text-editor-42~rc1-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-software-42~rc-2.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-clocks-42~beta-1.fc36.x86_64 libgtk-4.so.1()(64bit) is needed by (installed) gnome-font-viewer-42~rc-1.fc36.x86_64
I also think GNOME will change the priority if ibus-gtk4 will be installed by default.
It needs to be installed by default for Xorg sessions.