Our tvOS app makes use of top shelf Carousel style slides to promote our content. We would like to detect when tvOS transitions between individual top shelf slides, regardless of whether the slide transition is made by a user (via the Siri remote), or by the system idle auto-transition. Has anyone achieved this, maybe there are undocumented system hooks or events we can listen to?

I am familiar with providing the main layered app icon for a tvOS project, but I cannot work out how to successfully add support for alternative layered icons in the info.plist and/or asset catalog and/or build settings for a SwiftUI (or Swift) tvOS project. Whenever I check the result of UIApplication.shared.supportsAlternateIcons it returns false I have witnessed other tvOS apps such as Plex successfully switch the app icon, so it must be possible to do. How should the project be configured, what am I missing?