Apex domains cannot have CNAME records.
Question and response
Question
dig fnzfi.net. NS
Answer
fnzfi.net. 4 NS swan.fnzfi.net.
fnzfi.net. 4 NS ladybird.fnzfi.net.
Authority
The response has no authority records.
Additional
swan.fnzfi.net. 4 A 185.142.150.148
ladybird.fnzfi.net. 4 A 185.142.150.20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0