AWS CloudFormation StackSets supports drift detection, which means that you can now view aggregated drift results for your StackSets and their stack instances from one view in one account. Drift detection lets you check that the actual configuration of application resources matches their configuration intent. StackSets extend CloudFormation stacks by allowing you to manage stack operations across multiple regions and accounts in one operation.  

from Recent Announcements: https://aws.amazon.com/about-aws/whats-new/2019/11/cloudformation-announces-drift-detection-support-in-stackSets/