The App Library is a completely new feature in iOS 14. It’s only accessible on your iPhone, not your iPad. It brings all of your apps into one place. So if you have a bunch of folders on your iPhone and you can’t find a certain app, you can just go into the App Library and find it in two different ways: category view or search and list view. Here are the two!
Here, all of your apps are separated into different categories, like games, entertainment and more. You can tap the bottom right of any category and it will show you all your apps in that category.
Search and List View
Here, all of your apps are categorized in alphabetical order. You can scroll through the apps, scroll through the letters on the side or you can search for a specific app.