I honestly don't understand how AWS expects folks to take Config seriously when it's missing support for the majority of the AWS services portfolio.
https://docs.aws.amazon.com/config/latest/developerguide/res...
It's incredibly frustrating too, because the Config recorder builds a nice graph of related objects for you (although it would be nice if they added ARN references rather than just IDs) and the Config rules 'marketplace' could be a nice place for vendors to ship a variety of regulatory and standards compliance kits.
We have hundreds of AWS accounts and all but ignore the service in favor of third party, open source and in-house built products with appropriate coverage.