Apex domains cannot have CNAME records.
Question and response
Question
dig xenquolir.com. NS
Answer
xenquolir.com. 5 NS ns1.xenquolir.com.
xenquolir.com. 5 NS ns2.xenquolir.com.
Authority
The response has no authority records.
Additional
ns1.xenquolir.com. 5 A 51.89.194.199
ns2.xenquolir.com. 5 A 51.77.103.13
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0