Apex domains cannot have CNAME records.
Question and response
Question
dig qfiber.it. NS
Answer
qfiber.it. 4 NS ns1.micso.it.
qfiber.it. 4 NS ns2.micso.it.
Authority
The response has no authority records.
Additional
ns1.micso.it. 4 A 195.32.69.20
ns2.micso.it. 4 A 195.32.69.14
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0