After following these steps, your Mac will no longer show the desktop when you click on the wallpaper, except when Stage Manager is on. Was this feature bothering you?

The fourth beta of macOS Big Sur, released yesterday, adds a new toggle in System Preferences that's designed to disable the wallpaper tinting ...

For example, with Desktop Tinting enabled, very little of a macOS window is actually pure black. Instead, it’s a dark shade that incorporates accents from your wallpaper colors.