On Fedora, you can just install qdbus-qt6 (for the recent version), which is needed to do some actions like change the brightness or interact with other KDE (and maybe LXQt) components through the Terminal.
There are 2 packages, kdePackages.full (which adds a ton of stuff) and kdePackages.qttools which also adds a lot, including GUI tools.
Is there a way to only get qdbus? Or would I need an overlay for that package?