On the above, it seems there may be a “gap” between what is required by KCC documents wise and what is required for the interview as per any normal immigrant visa interview. Maybe will help someone else - probably worth double checking against those requirements where one would see:
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Marriage Certificates
If you are or have been married, you must obtain original marriage certificate/s or certified copies of
EVERY marriage.
Marriage Termination Documentation
If you were previously married, you must obtain evidence of the termination of
EVERY prior marriage you have had. Your evidence must be an original or certified copy of one of the following documents: FINAL legal divorce decree, death certificate, or annulment papers.
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There are also other records possibly relevant example I don’t think KCC asks for military records but these are needed if someone has served
travel.state.gov