Apex domains cannot have CNAME records.
Question and response
Question
dig help-it.biz. NS
Answer
help-it.biz. 1 NS ns12.starlink.ua.
help-it.biz. 1 NS ns11.starlink.ua.
help-it.biz. 1 NS ns13.starlink.ua.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0