You are confidently acting like you understand this process, while repeatedly confusing design certification (of the type) vs. airworthiness certification (of individual airplanes).
Nah, you can figure that out pretty easily yourself, and I get the sense your question is not in good faith. Earlier in this thread you called someone "profoundly lazy" for asking a less simple question.
There are many types of designation in the system; your quote above is _not_ about Production Certification ODA staff (which this article is about), and indeed there is no world where Production Certification ODA would be expected to find the MCAS issue your quote is about. Those would be Type Certification ODA folks.
You should go read the OIG report. Kind of a bummer because they put all this work into a document that you're just sitting here exemplifying the exact misunderstanding that they found as the major issue.
Maybe DOT OIG is confused? Big if true!