APP STORE
Accidentally my app store icon was deleted from my I phone. I tried to reinstall the icon but have not been able to.
iPhone 8 Plus, iOS 13
No, that's impossible. You can't delete that app.
Check better if it has accidentally moved to a different screen page or into a folder.
If it is not there, check: Settings>ScreenTime>Content&Privacy Restrictions>Itunes&AppStore Purchases... the first 3 options must be ALLOWED. When done, restart your iphone and the app icon should appear.
Regards
Giulio