This is just a script 😅 to help with reading the registry setting for if Windows Apps are set to run in Light or Dark mode.
Adding it to your shell rc or profile will cause it to evaluate whenever you run a Linux app in WSLg, which will cause the app to then launch in a light/dark theme if it supports GTK theming and is Wayland (I've noticed XWayland doesn't always end up in the expected theme...).
Adwaita and Adwaita-dark.
# dnf based
sudo dnf install gnome-themes-extra
# apt based
sudo apt install gnome-themes-extra