I archived and submitted a cordova app using Xcode. On testing locally, I find that the icon is correctly shown on the app itself, but when I go to iTunes Connect, the app i
On the AppStore Tab, select the build you want to prepare for submission (should be a link your version number with a yellow dot and "Prepare for submission" afterwards).
In the following pane, scroll down to where there is an empty well for your icon.
Click on it and select a 1024 x 1024 icon you want to upload. Done.