Application Store icons should now be delivered by an asset catalog.
To add an App Store icon, first locate the App Icon image set in the Assets.xcassets file of your project.
For information on setting the store icon refer to the App Store Icon guide.
For an i OS application to be accepted by Apple for inclusion in the App Store, it requires proper icons and launch screens for all of the i OS devices that it will be running on.
A couple of things to watch out for when submitting an app are: Apple also maintains a list of App Store submission tips.
You can read these at Distributing on the App Store.
Creating an App ID and optionally selecting entitlements involves the following steps using Apple's web-based i OS Provisioning Portal: In addition to selecting and configuring the required Application Services when defining your App ID, you also need to configure the App ID and entitlements in your Xamarin.i OS project by editing both the For detailed instructions, please see our Provisioning for Application Services documentation.
The required icon in the Asset Catalog is named App Store and should be 1024 x 1024 in size.
Apple have stated that the app store icon in the asset catalog can't be transparent nor contain an alpha channel.
Therefore, you stand the best chance of making it through Apple review by familiarizing yourself with these guidelines and trying to adapt your application to them.
Apple’s guidelines are available at: App Store Review Guidelines.