How to Permanently Delete an App from Your iPhone (iOS 14)
Goto the App Library Screen on your iPhone, by swiping until you get to the App Library screen.
Press on the search bar at the top, You should then see a running alphabetical list of all your apps.
Scroll down to find the app you wish to delete.
Press on the icon to the left of the app name. You should see options: Add to Home Screen, Share App and Delete App.
Select Delete App to get rid of it.
Sometimes, you will get a message that it is downloading the app. Once downloaded, you can press on icon again and delete it.