Guideline 2.3.8 - Performance - Accurate Metadata

Your app or its metadata does not appear to include final content.

Specifically, your app icons appear to be placeholder icons.

Next Steps

To resolve this issue, please ensure all your app icons are finalized and similar enough to each other to avoid creating confusion. When users search for your app on their devices, they should be able to recognize it from the icon on the App Store.

Resources

Since the large app icon will be displayed for your app on the App Store, we recommend you provide an attractive, original icon that meets the following requirements for both iPhone and iPad apps. App Store Connect Help includes information on adding an App Store icon. Review the iOS Human Interface Guidelines for additional details about app icon image sizes and resolutions.

For resources on creating eye-catching icons, you may want to review the App Store Product Page information available on the Apple Developer website.

Please see attached screenshot for details.