Apex domains cannot have CNAME records.
Question and response
Question
dig fnzse.net. NS
Answer
fnzse.net. 1 NS kaiser.ns.cloudflare.com.
fnzse.net. 1 NS ruth.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
ruth.ns.cloudflare.com. 3 A 108.162.192.143
ruth.ns.cloudflare.com. 3 A 172.64.32.143
ruth.ns.cloudflare.com. 3 A 173.245.58.143
kaiser.ns.cloudflare.com. 3 A 108.162.195.9
kaiser.ns.cloudflare.com. 3 A 162.159.44.9
kaiser.ns.cloudflare.com. 3 A 172.64.35.9
ruth.ns.cloudflare.com. 3 AAAA 2606:4700:50:0:0:0:adf5:3a8f
ruth.ns.cloudflare.com. 3 AAAA 2803:f800:50:0:0:0:6ca2:c08f
ruth.ns.cloudflare.com. 3 AAAA 2a06:98c1:50:0:0:0:ac40:208f
kaiser.ns.cloudflare.com. 3 AAAA 2606:4700:58:0:0:0:a29f:2c09
kaiser.ns.cloudflare.com. 3 AAAA 2803:f800:50:0:0:0:6ca2:c309
kaiser.ns.cloudflare.com. 3 AAAA 2a06:98c1:50:0:0:0:ac40:2309
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0