Hello
Those are just the IP addresses used for "WHM Home » DNS Functions » NS Record Report". The functionality of the "NS Record Report" page is for visual purposes only. It is a report, and not a page meant to configure any aspect of DNS. It reports the nameservers used by DNS zones on the server, as well as a count of the the number of zones that use a given nameserver. The important entries on the cPanel server are the "A" records that you have added for your name servers. Thus, as long as you have registered these name servers to the matching IP addresses at the domain registrar, then no further DNS configuration is required.
Note:
The NS Record Report page displays its results from the /var/cpanel/nameserverips.cache file. If you alter the configuration in /var/cpanel/nameserverips.yaml and the results on this page change, run the /usr/local/cpanel/scripts/updatenameserverips script to force a cache update.
Thank you.