Missing App Store

Here's an updated version by me:

You can’t delete the App Store app so it is somewhere on your device.

See if you hid it with restrictions:

Screen Time - Allowed apps https://support.apple.com/en-us/HT201304#allow-apps

- "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

"Search for it. Swipe down from the middle of any home screen and type App Store 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."

"You can also Reset the Home screen layout which will return the App Store 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."

Pull down the screen and type App Store to search field.

Maybe you deleted the app from home screen but you can find it on App Library. Just swipe left your screen and you can find there all of your apps.

April 2018 Apple Recommended post by Demo about a missing App Store app - https://discussions.apple.com/message/33245486#message33245486 - check restrictions settings

More about the app library: Organize the Home Screen and App Library on your iPhone [iOS14] - https://support.apple.com/en-us/HT211345