Since March 27, 2020, customs in Mexico have allowed products to pass prior to final NOM certification from the Cert Bodies in Mexico (NYCE, ANCE, etc.).  If the NOM application has been submitted to the Cert Body with proper evidence of submission (application folio) and registered to the proper database, customs are currently allowing those products to pass, with the assumption that certification will later be completed.  The new process will continue until further notice.