The app icon of my iPad app appears as a placeholder/template instead of the correct app icon when viewed through the App Store. It is correctly displayed on the website version of the App Store, in App Store Connect, and when running the app.
I noticed that another app with the same issue is "Things 3 for iPad." This might be related to the fact that both apps are iPad-only.
I implemented a new app icon using the new Icon Composer. Since users can switch between different icons, some are created with Icon Composer and others are still included traditionally within the asset folder.
This is my app (Bubbles' Journal):
https://apps.apple.com/app/id1547297023