If the Stop & Shop app icon has disappeared from your iPhone but the App Store shows the app as 'Open' (not 'Get' or 'Install'), the app is still installed on your device but the icon is hidden or misplaced. This is a common iOS experience and can be fixed with the following steps:

1. Search in the App Library (iOS 14 or later):
- Go to your Home screen and swipe left until you reach the App Library.
- Type "Stop & Shop" in the search bar at the top.
- When you see the app, long-press the icon and select Add to Home Screen to restore the icon to your main screens16.

2. Check Your Folders:
- Sometimes, the icon can be accidentally moved into a folder.
- Open your folders and look for the app within them1.

3. Use Spotlight Search:
- On any Home screen, swipe down to reveal Spotlight search.
- Type "Stop & Shop"—if the app shows up, you can launch it directly or see which folder contains it58.
- If you find it, long-press and select Add to Home Screen if available7.

4. Reset Home Screen Layout:
- Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Home Screen Layout.
- This will reset your app arrangement to the default, and all app icons—including Stop & Shop—will return to the Home screen. Note: this will rearrange your current layout but won't delete any apps or data7.

5. Reinstall the App:
- If you can't find the app in the App Library or with search, it may have been removed.
- Go to the App Store, search for "Stop & Shop", and tap the download cloud or 'Install' if available. If it says 'Open', the app is still there—try the above steps again to find it6.

6. Check for Hidden Home Screen Pages:
- Long-press a blank space on your Home screen until the apps jiggle.
- Tap the page dots at the bottom and make sure all Home Screen pages are checked and visible6.

These steps should restore the Stop & Shop app icon to your Home Screen. If none of these methods work, restarting your iPhone can also sometimes resolve minor glitches2.