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