Apex domains cannot have CNAME records.
Question and response
Question
dig be-bop-alula.com. NS
Answer
be-bop-alula.com. 5 NS ns-275.awsdns-34.com.
be-bop-alula.com. 5 NS ns-1435.awsdns-51.org.
be-bop-alula.com. 5 NS ns-741.awsdns-28.net.
be-bop-alula.com. 5 NS ns-1739.awsdns-25.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0