Amazon S3 Multi-Region Access Points now support datasets that are replicated across multiple AWS accounts. Cross-account Multi-Region Access Points simplify object storage access for applications that span both AWS Regions and accounts, avoiding the need for complex request routing logic in your applications. They provide a single global endpoint for your multi-region applications, and dynamically route S3 requests based on policies that you define. This helps you to more easily implement multi-region resilience, latency-based routing, and active-passive failover, even when data is stored in multiple accounts.
Source:: Amazon AWS