Apex domains cannot have CNAME records.
Question and response
Question
dig xyloventa.com. NS
Answer
xyloventa.com. 5 NS ns-1626.awsdns-11.co.uk.
xyloventa.com. 5 NS ns-1695.awsdns-19.co.uk.
xyloventa.com. 5 NS ns-741.awsdns-28.net.
xyloventa.com. 5 NS ns-1278.awsdns-31.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0