How can I find an app that I lost on my iPhone?

Use App Library to search the app you are looking for, see -> Organize the Home Screen and App Library on your iPhone -> Organize the Home Screen and App Library on your iPhone - Apple Support           

• If you have find the app, tap & hold on the app, then drag to the Home screen & drop it.

Lindasb123, Ok, simply swipe your iPhone pages to the left until you come up on the App Library (Last Page). Then where it says App Library type PNC. If you didn't delete the app it will show up. If you did delete it simply go back the Apple App store and download it again.

Hello Lindasb123, What is the name of the app?