installmentsInfo property
Describes the billing plan that a user is committing to when they purchase a subscription. This will be present when a product uses a non-upFront billing plan. Always null on Android, when using StoreKit 1, or when running on <iOS 26.4. For Play Store installment subscriptions, use the installmentsInfo of the defaultOption or subscriptionOptions instead.
Implementation
final InstallmentsInfo? installmentsInfo;