There is no easy way to apply wallpaper to every virtual desktop.
This utility takes care of that.
Download binary from releases, place it to “/usr/local/bin” and run:
You can also use MacOS quick actions to apply wallpaper from context menu (check releases notes)
This utility is still expirimental and
it updates the local sqlite db file “~/Library/Application Support/Dock/desktoppicture.db”
In case something goes wrong delete this file and MacOS will recreate it.
Code based on pywal wallpaper update.