AWS CloudFormation now supports Amazon S3 on Outposts

You can now use AWS CloudFormation templates to create and manage Amazon S3 on Outposts resources, allowing you to create buckets, endpoints and access points. Amazon S3 on Outposts delivers object storage to your on-premises AWS Outposts environment to meet local data processing and data residency needs. Using Amazon S3 APIs and features, Amazon S3 on Outposts makes it easy to store and manage data on your Outpost.

Source:: Amazon AWS