Hello,
I would like to suggest a change for the folder structure of the wallpaper. Since I am using KDE, most of the wallpapers have support 2 color variant, light and dark mode. The light wallpaper files should be in /usr/share/wallpaper/openSUSEdefault/content/image and the dark one should be in the /usr/share/wallpaper/openSUSEdefault/content/image-dark so that it when you change the color of your theme, the wallpaper also adapt to it automatically.