Apex domains cannot have CNAME records.
Question and response
Question
dig denisecox.shop. NS
Answer
denisecox.shop. 3 NS ns1.denisecox.shop.
denisecox.shop. 3 NS ns2.denisecox.shop.
Authority
The response has no authority records.
Additional
ns1.denisecox.shop. 3 A 142.171.175.73
ns2.denisecox.shop. 3 A 142.171.150.54
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0