How I fixed the screen brightnes on ASUS ROG Zephyrus G16 GU605MV running Project Bluefin / Fedora Silverblue
In general you follow the steps at: https://asus-linux.org/guides/fedora-silverblue-guide/ to set everything up.
The rpm-ostree install akmod-nvidia xorg-x11-drv-nvidia-cuda xorg-x11-drv-nvidia-power asusctl supergfxctl
command had some conflics with stuff already installed by bluefin. So I installed those one by one instead to make sure I had everything, because for some reason rpm-ostree freaks out and cancels all installs if one conflics...
The screen brightness on the keyboard does not work on Project Bluefin / Fedora after I installed in on my new ASUS ROG G16 and following the stpes on the above link though.