Hi,
Thank you very much for your feedback and sharing. We're glad that the question is solved now. It may help others who have similar issue. Here's a short summary for the problem.
Problem/Symptom:
Windows 2019 servers do not recognize the latest CU update as "Required".
Solution:
Take another day to show up.
If you have any questions in future, we warmly welcome you to post in Microsoft Q&A forum again. Thanks again for your time.
Best regards,
Simon
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