Apex domains cannot have CNAME records.
Question and response
Question
dig xynavora.com. NS
Answer
xynavora.com. 5 NS ns-1885.awsdns-43.co.uk.
xynavora.com. 5 NS ns-2015.awsdns-59.co.uk.
xynavora.com. 5 NS ns-242.awsdns-30.com.
xynavora.com. 5 NS ns-1827.awsdns-36.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0