User Profile

When does Apple plan to support a server notification for when a subscription auto renews? Best I can tell from the documentation and online articles there doesn't appear to be a notification type for this scenario. There are notifications when a renewal fails because of billing issues (ie DID_FAIL_TO_RENEW), when a previously expired subscription gets renewed (ie DID_RECOVER), and when a user interactively triggers a renewal (ie INTERACTIVE_RENEWAL). But nothing for when a user transitions from say a trial to an automatic renewal. Seems like a pretty big gap for a subscription-based notification system.