In this article, we'll show you how to move apps from the App Library to your iPhone's Home screen. We'll also show you how to find an app using Spotlight and then add it to your Home screen.
How to Hide Home Screen Pages and Move Apps on Your iPhone — Apple Support
If you had an app on your iPhone’s home screen that is no longer there, it is likely still accessible via the App Library. To get the app back on your home screen, you can either long-press the app in your App Library and select the Move to home screen option, or drag the app from your App Library to your home screen.
To move an app from your App Library to the Home screen:
From the Home screen, swipe left until you reach the App Library.
