“Restrictions” is an iPhone function that helps to block some particular applications or functions of the iOS device. This is a basic solution for any problem on the iOS device.
If the app store icon is really missing, forcing the device to restart may surely help. Enter the application to search and you will find Siri’s suggestions. If you have iOS 10 or the newest iOS version, swipe right from the main home screen.Be sure to swipe when you’re on the home screen.
Note that it does not work when it is in a folder or application. This is because, many times, the app store is only hidden and, therefore, here you must do a prominent search. The main thing to combat the problem of the disappearance of the app store is to determine if the app store has actually disappeared or not. Make sure the App Store really disappeared Here the methods to restore App store on iPhone.