CDK v1 detected by AWS. "Action required" email notice

Since you migrate all in January 2022, maybe is a false positive. Maybe they gathered the data from all accounts before you complete your migration.

Since is a tool from CDK Labs, is safe to assume their findings are compliant. Mu mindset is that is better to have a false positive like this than not have awareness at all. So, I think you can assume you are covered.

Did the email you receive is from the same email in the account you had run the checks? (I know is a very basic question, but just double checking in case you have more than one account).

That's what I think too. I received an email by account and by region. It is reassuring that this could be a false positive however, doubt will still remain about a potential residual.

Thanks for the answer.