You can now choose to apply Billing Grace Period only to existing paid renewals, or continue applying it to all subscription renewals (existing paid renewals and free offers transitioning to paid renewals). You can also choose a duration of 3, 16, or 28 days instead of having the duration predefined based on your subscription length. When you enable Billing Grace Period in App Store Connect, Apple attempts to address any subscriber billing issues and recover the subscription while subscribers retain access to subscription benefits. If the subscription is recovered within this period, there’s no interruption to the days of paid service or to your revenue.

Learn how to enable Billing Grace Period