Accidentally deleted phone app. How to recover?

What is 'the Apple app'?

If it was actually deleted, then you'll need to search for it in the App Store and download it again.

Redownload apps and games from Apple - Apple Support

If it was just 'removed' (different than deleting) than you just need to move it back out from the App Library

From your Home Screen, swipe left until you get to the App Library.

Swipe downward and you'll get an alphabetical list of your apps.

Locate the app in the list or type the app name into the search field

Once you've located the app, tap/hold until it raises/selects, then drag it and it'll pop out to your Home Screen

Organize the Home Screen and App Library on your iPhone - Apple Support

You can’t delete it. Look on other pages, in folders. Look in the App Library.

how do i get the icon back on my phone

my grandson deleted my Apple app and i need to retrieve it thanks

please reply