Apex domains cannot have CNAME records.
Question and response
Question
dig greenlionbreads.com. NS
Answer
greenlionbreads.com. 2 NS ns-1474.awsdns-56.org.
greenlionbreads.com. 2 NS ns-813.awsdns-37.net.
greenlionbreads.com. 2 NS ns-605.awsdns-11.net.
greenlionbreads.com. 2 NS ns-1093.awsdns-08.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0