readReplicaDBClusterIdentifiers property
Contains one or more identifiers of Aurora DB clusters to which the RDS DB instance is replicated as a read replica. For example, when you create an Aurora read replica of an RDS MySQL DB instance, the Aurora MySQL DB cluster for the Aurora read replica is shown. This output does not contain information about cross region Aurora read replicas.
Implementation
final List<String>? readReplicaDBClusterIdentifiers;