AWS RoboMaker now supports Robot Operating System 2 (ROS2) feature in beta release. ROS2 expands ROS’s use cases with increased security, quality of service, support for embedded systems and real-time scenarios.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/10/aws-robomaker-introduces-support-robot-operating-system-2-beta-release/