Apex domains cannot have CNAME records.
Question and response
Question
dig corpgate.pro. NS
Answer
corpgate.pro. 5 NS monika.ns.cloudflare.com.
corpgate.pro. 5 NS kayden.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0