Set a Wallpaper in the Settings App on Windows ... right-click a background image and select "Set For Monitor 1," "Set For ...
However, when you use a dual monitor setup, it is quite difficult to use a single wallpaper on both of the ... and choose Set for desktop > Desktop 1/2/3 or any other number that you may have.
Windows 11 preview build 23516, released in the Dev Channel on August 2, 2023, introduced HDR wallpaper support ... Next, check if your monitor supports high dynamic range by heading to Settings ...