Apex domains cannot have CNAME records.
Question and response
Question
dig busbysswanginbbq.com. NS
Answer
busbysswanginbbq.com. 5 NS ns-1918.awsdns-47.co.uk.
busbysswanginbbq.com. 5 NS ns-1200.awsdns-22.org.
busbysswanginbbq.com. 5 NS ns-821.awsdns-38.net.
busbysswanginbbq.com. 5 NS ns-1281.awsdns-32.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0