Apex domains cannot have CNAME records.
Question and response
Question
dig beten.digital. NS
Answer
beten.digital. 5 NS ns-1138.awsdns-14.org.
beten.digital. 5 NS ns-979.awsdns-58.net.
beten.digital. 5 NS ns-1067.awsdns-05.org.
beten.digital. 5 NS ns-1459.awsdns-54.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0