Thank you for writing on our community forums.
For all process about domain name integrations and ccTLD, you can review the following documents. These documents will help you do what you want. If you don't know enough about this, you can work with a PHP developer.
https://docs.wisecp.com/en/kb/getting-started-domain-name-registrar-integration
https://docs.wisecp.com/en/kb/cctld-gtld-whois-server
Thanks.