You can now use AWS Backup, an automated and centralized backup service, to backup Amazon EFS file systems in the AWS US West (N. California), Canada (Central), Europe (London), Asia Pacific (Singapore), Asia Pacific (Tokyo), and Asia Pacific (Seoul) Regions.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/backup-amazon-efs-file-systems-us-west-canada-europe-asia-pacific/