I think Doug has already pointed to this:
Email for comments: sp800-189@nist.gov
mentioned in the link:
https://csrc.nist.gov/publications/detail/sp/800-189/draft
We are thankful that many helpful comments/suggestions
were received from ISPs, other organizations and individuals earlier on the
1st (initial) public draft. For anyone interested to peruse ....
those comments and authors' responses are compiled here:
https://csrc.nist.gov/CSRC/media/Publications/sp/800-189/archive/2018-12-17/documents/NIST.SP.800-189-draft-comments-responses.pdf
We are now welcoming comments on 2nd draft.
Sriram