Following the Tailor the VoiceOver experience in your data-rich apps, I implemented a small app in SwiftUI and a similar small app in UIKit to test the AXCustomContent API. I followed the video with how to implement, however, I am not getting any options to hear more content. The VoiceOver read out stops after the main accessibility label, and my extra content is never read.
I am using Xcode 13 beta and iOS 15. Is there any other requirements for this API?