Billing Grace Period (Apple)

Billing Grace Period lets subscribers whose auto-renewal failed due to a payment issue continue accessing your app’s paid content for a period of time while Apple continues to attempt to collect payment. There won’t be any interruption to the subscriber’s days of paid service or to your revenue if Apple is able to recover the subscription within the grace period. Without enabling Billing Grace Period, the subscriber’s days of paid service are paused until Apple is able to collect payment.
The duration of the grace period can be configured in App Store Connect, and the options are based on your subscription’s standard duration. You can also access Billing Grace Period settings with the App Store Connect API.