According to the search results, it is not possible to delete the App Store app from an iPhone. However, it is possible to remove the App Store app from the home screen in iOS 14 by going to the App Library and touching and holding the app, then sliding it left back to the home screen. If the App Store icon is missing, it may be inside a folder on the phone or hidden in the App Library. To find it, one can use the search function or restore the home screen to resolve any bugs. If the App Store app is accidentally removed from the home screen, it can be added back by restoring the home screen or resetting the home screen layout.