Restore non apple apps I moved to the App Library but still displayed in settings / general, how?

Use App Library to search the apps 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 apps, tap & hold on the app, then drag to the Home screen & drop it.

Use App Library to search the App Store, see -> Use the App Library and Home Screen to organize your iPad apps -> Find your apps in App Library on iPad - Apple Support

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

• You have quick access to App Library by tapping the App Library icon in the iPad's Dock.

I Ned help I accidentally deleted my App Store

I was looking through my iPad and I asked accidentally clicked a button with you deleted it and I don’t know how to get it back