This beginner\'s dedicated guide will show you how to fix Windows Spotlight not working on Lock Screen in Windows 10.
Press Windows Key + I to open Settings panel. Then go to Personalization > Lock Screen. Under the Background option, choose Picture/Slideshow option for Lock Screen background.
Now enable Windows Spotlight feature in Settings app. Then press Windows Key + L to lock screen and check. You should be able to see Windows Spotlight screen now.