Using a slideshow for the desktop background on two monitors, and always displaying the same image on both monitors? Windows 10/11 picks different images from the slideshow folder for each.
Not a different folder but one can have different images for each monitor.
Having one slideshow for the default desktop, and then a different slideshow for a virtual desktop? Windows 10 uses the same background for all, Windows 11 allows them to be different but only if they are static images.
DS does not treat Virtual desktops any differently.
Stardock Support Manager