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