cyberax parent
A lot of internal AWS services have names that are completely opaque to outside users. Such a document will be pretty useless as a result.
+1, SREs can spend months during their onboarding basically reading design docs and getting to know about services in their vicinity.
Short of publicly releasing all internal documentation, there's not much that can make the AWS infrastructure reasonably clear to an outsider. Reading and understanding all of this also would be rather futile without actual access to source code and observability.