Apex domains cannot have CNAME records.
Question and response
Question
dig novis.pt. NS
Answer
novis.pt. 4 NS kianchau.ns.cloudflare.com.
novis.pt. 4 NS lily.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0