When I submit my app from xcode to Apple store, it complaint that missing 57x57 and 72x72 icons. However, in the xcassets, don't have the slot to add 57x57 and 72x72 icon. May refer to the attached screenshots.
Remove AppIcon-1
from Assets.xcassets
Set all AppIcons in varies sizes.
Then setup
AppIcon in Target->General->App Icons and Launch Images
Then Clean and Run your project. And verify on simulator. Then archive
it