How do I restore App Store app on my iPhone 11?

Hello,

It appears you cannot find your App Store app. This issue is mentioned in this support article --> Download apps and games on your iPhone or iPad - Apple Support

Certain built-in apps cannot be deleted so it is somewhere on your device. It can be hidden* by you, or by an administrator if your device is managed by an education or business institution. In the latter case you need to contact the administrator.

See if you hid it with restrictions:

Screen Time - Allowed apps Use parental controls on your child's iPhone and iPad - Apple Support

- "If you turn off an app or feature, it won’t delete it, it’s just temporarily hidden from your Home screen."

- Settings > Screen Time > Content & Privacy Restrictions > [Enter passcode] > Allowed Apps

- Settings > Screen Time, scroll down, then turn off "Share across Devices"

See if it is in your App Library -->

Organize the Home Screen and App Library on your iPhone [iOS14] - Organize the Home Screen and App Library on your iPhone - Apple Support

"Search for it ( Use Spotlight Search on your iPhone, iPad, or iPod touch - Apple Support ). Swipe down from the middle of any home screen and type the name of the app into the search field at the top of the screen. If it is in a folder, it will show the folder on the right of the app name after you tap on the app when it appears in the search."

"Reset the Home screen layout which will return the [app] to the home screen as long as it isn’t restricted. When you do this, it returns the home screen to out of the box condition and it will destroy any folders you had on the home screen. Settings > General > Reset > Reset Home screen layout."

* Use parental controls on your child's iPhone and iPad - Apple Support "If you turn off an app or feature, the app or feature won't be deleted, it's just temporarily hidden from your Home Screen."

The App Store cannot be deleted, but you may not be able to see it for a couple of reasons:

• If it has been removed from the Home Screen, you can find it in the App Library. Swipe all the way to the left to reveal the App Library and either enter App Store in the search field or swipe down to find the app Alphabetically. If you do not see it there, then the issue is with Screen Time Restrictions in the next point.
• Screen Time settings can make the App Store not visible on your phone. The location of the setting is at Settings > Screen Time > Content & Privacy Restrictions > iTunes & App Store Purchases > Installing Apps. If you are part of a Family Plan, the Organizer may have to give you access from their phone.