AWS Lambda now supports Amazon SQS FIFO as an event source. This allows you to use Lambda for building event-driven applications where ordered events and operations are critical. For example, you can build an application that displays the correct product price by sending price modifications in the right order.  

from Recent Announcements: https://aws.amazon.com/about-aws/whats-new/2019/11/aws-lambda-supports-amazon-sqs-fifo-event-source/