Drift detection is only implemented for a very small subset of resources: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-stack-drift-r

Drift detection is only implemented for a very small subset of resources: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-stack-drift-resource-list.html https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGui... For a concrete example of one that bit us one time, database parameter groups don't support drift detection.