Apex domains cannot have CNAME records.
Question and response
Question
dig virtude.xyz. NS
Answer
virtude.xyz. 5 NS ns3.epik.com.
virtude.xyz. 5 NS ns4.epik.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0