Appstore

It would help if you could be more specific than "wrong" because then we either post nothing or present you with a bewildering assortment of every support articles mentioning the App Store. :-) . Unfortunately you have provided insufficient information for us to propose a specific solution. Describing what happens when you try, and the exact wording of any error messages, would greatly aid us in helping you. In the meantime review these documents if you think they apply:

Click on this link "If you can’t download or update apps on your iPhone or iPad " --> https://support.apple.com/HT207165

If the first 5 don't help, use the 6th.

Considerations:

Do you have the same problem when using a different Wi-Fi network?

Does restarting your device make any change?

Can you download apps normally on another device?

If instead you see a message that says "Your account has been disabled in the App Store and iTunes" click on this --> https://support.apple.com/HT208856

Resolve issues between iTunes and third-party security software - https://support.apple.com/HT201413 - You can’t connect to iTunes Store to buy or download content.

If you see 'app needs to be updated' after updating to iOS 14.5, click here --> https://support.apple.com/HT212310

Have you entered a payment method? This document explains how to 'Change, add, [review,] or remove Apple ID payment methods' on an Apple mobile device, a Mac, or a PC; click here --> https://support.apple.com/HT201266

Apple Recommended article by ASC contributor Urquhart1244 --> https://discussions.apple.com/thread/8434425 with various suggestions about network, payment and log-in issues.

"If you can't connect to the App Store, iTunes Store, or Apple Books" click here --> https://support.apple.com/HT201400

- If none of the suggestions work, try the last one: "If you’ve tried all of the above steps and you still can’t connect, contact Apple Support."

The App Store app 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 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

See if it is in your App Library -->

Organize the Home Screen and App Library on your iPhone [iOS14] - https://support.apple.com/HT211345

"Search for it ( https://support.apple.com/HT201285 ). 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."

"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."

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