Hello. Are you trying to have different images rotating automatically on each monitor from the same folder, or have completely separate slideshow collections/timers per monitor?
If you use Slideshow as the desktop background, Windows 11 can automatically display different images on each monitor at the same time from the same selected folder.
However, Windows still does not support fully independent slideshow behavior per monitor.
For example, the following is not supported natively:
• Monitor 1 using Folder A • Monitor 2 using Folder B • Different slideshow intervals per monitor • Separate shuffle behavior per display
The built-in personalization system only uses one slideshow source and one timing engine globally across all monitors.
You can find more information on this by visiting this link: https://support.microsoft.com/en-us/windows/change-the-desktop-background-in-windows-4a33c533-b71e-447e-b021-a27df2678938