Apex domains cannot have CNAME records.
Question and response
Question
dig unifique.cloud. NS
Answer
unifique.cloud. 5 NS nile.ns.cloudflare.com.
unifique.cloud. 5 NS jule.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0