The App Library is a feature introduced in iOS 14 that allows the user to find and search for apps organized by category.
Swipe left past the last page of the home screen to access the App library. Apps in each category are organized by frequency of use. Use the search field to look for an app. Tap and hold an app icon to share or delete it.
- Organize the Home Screen and App Library on your iPhone at Apple Support
- iOS 14: App Library at Wikipedia