AWS Transfer for SFTP (AWS SFTP) is now available in the Europe (Stockholm) and South America (Sao Paulo) AWS Regions. AWS SFTP enables you to easily move file transfer workloads to AWS, eliminating the need for you to build and operate Secure Shell File Transfer Protocol (SFTP) infrastructure. 

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/08/aws-transfer-for-sftp-now-available-europe-stockholm-south-america-sao-paulo-regions/