I want to save the snapshot settings of all the resources on AWS for change management and enable rollback of resource configuration to desired state

Question

I want to save the snapshot settings of all the resources on AWS for change management and enable rollback of resource configuration to desired state This is required for the audit purpose on our AWS account to see un announced changes and rollback to the previous state if required. Is there a way we can rollback automatically? This requirement should be applicable for all the resources on AWS

I tried to get the resource snapshot from AWS config and stored it to S3 bucket. But this wrote the Configuration related to AWS config service itself, not actual resource snapshots.

I am confused whether to use cloudtrail or aws config to see the events and changes