NTSB Rips FAA For Delayed 737 Rudder Response

The NTSB’s investigation report dated Sept 24 says:

On the basis of the results of postincident testing conducted in July 2024…

If the testing that revealed the cause of the incident was only done in July, what sort of “action” is the NTSB expecting the FAA or Boeing to have taken prior to that?
When exactly did the NTSB make safety recommendations based on the findings of the investigation?