SUMMARY After updating konsole from 25.12.0 to 25.12.1 with dnf update, konsole is now in light mode, regardless of the system setting SOFTWARE/OS VERSIONS Fedora 43 Gnome 49 Wayland
Found that dark mode can be forced with ~/.config/gtk-3.0/settings.ini set to: [Settings] gtk-theme-name = Adwaita:Dark gtk-application-prefer-dark-theme = true