We can only see "Clear Image" and "Load from file..." buttons, which doesn't help inexperienced user to choose wallpapers that are already installed, for example, if i want to use my desktop wallpaper same as login screen background, i am unable to find it. I can only find downloads folder and if i download some image and click on "downloads" place on file browser, maybe i could set that image, but this screen should be similar to changing wallpaper of desktop, a list of installed images and a button to load image is an extra.

STEPS TO REPRODUCE
1. Open systemsettings -> Startup and Shutdown -> Login Screen (SDDM)
2. On any selected theme, there is a "Change Background" button, click on it

OBSERVED RESULT
We can only see "Clear Image" and "Load from file..." buttons, and clicking on "Load from file..." button doesn't show installed wallpapers, instead it shows a file browser with home location, doesn't contain images there.

EXPECTED RESULT
A list of images in the user's wallpapers folder and "Load from file..." button could be exist at the bottom. This should be similar to changing wallpaper of the desktop.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.15.41-1-MANJARO (64-bit)
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.4