For macOS Sonoma, Apple changed the Mac so that clicking on the desktop activates Expose and hides all your apps. Fortunately, you can stop it — albeit with a workaround.
The new macOS Sonoma’s default desktop wallpaper
We’re not going to use words like annoying, but you might. The first time you use macOS Sonoma and you click on the desktop, it is startling at least.
Tip: How to turn off macOS Sonoma’s click to reveal desktop
Tip: How to turn off macOS Sonoma’s click to reveal desktop