The Dynamic Theme App for Windows 11/10, lets you set & automatically change Bing and Spotlight images as background & lock screen dynamically.

Spotlight represents a clear departure from the platform’s origins of intimate communication with real friends. This diversification of functionality builds on a growing user behaviour trend: ...

How do I fix Microsoft Spotlight? If Microsoft Spotlight is not changing the dynamic background or cannot display new images, check region and language settings and clear Spotlight’s cache data.