Amazon S3 on Outposts now supports S3 Replication on Outposts. This extends S3’s fully managed approach to replication to S3 on Outposts buckets, helping you meet data residency and data redundancy requirements. With local S3 Replication on Outposts, you can create and configure replication rules to automatically replicate your S3 objects to another Outpost, or to another bucket on the same Outpost. During replication, your S3 on Outposts objects are always sent over your local gateway (LGW), and objects do not travel back to the AWS Region. S3 Replication on Outposts provides an easy and flexible way to automatically replicate data within a specific data perimeter to address your data redundancy and compliance requirements.
Source:: Amazon AWS