Apex domains cannot have CNAME records.
Question and response
Question
dig directadmin.dev. NS
Answer
directadmin.dev. 2 NS terin.ns.cloudflare.com.
directadmin.dev. 2 NS macy.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0