Also encountering this exact issue in Xcode 27 beta 5 as well. Submitted FB24273615.

One thing I have noticed about the sandbox testing account is that it will still return the value of false for AgeRangeService.shared.isEligibleForAgeFeatures even if you have a valid scenario selected from the developer menu, if you happen to be signed into your sandbox account via the standard iCloud sign in flow (like how one would for Apple Pay sandbox accounts) You must make sure you are not signed into your sandbox account anywhere else on the test device other than in the developer settings.

For my testing: try await AgeRangeService.shared.isEligibleForAgeFeatures fails to even execute. The async task never comes back. Is anyone else seeing this behavior? Edit: Would help to have the Declared Age Range entitlement added to the project. That fixed the issue for me. 🤦‍♂️

Running into the same issue on our project as well. Make sure to file a Feedback Request: Mine is FB9807970