Apex domains cannot have CNAME records.
Question and response
Question
dig skcvbhu.br.com. NS
Answer
skcvbhu.br.com. 5 NS jill.ns.cloudflare.com.
skcvbhu.br.com. 5 NS aarav.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
jill.ns.cloudflare.com. 1 A 108.162.192.122
jill.ns.cloudflare.com. 1 A 172.64.32.122
jill.ns.cloudflare.com. 1 A 173.245.58.122
aarav.ns.cloudflare.com. 1 A 108.162.195.60
aarav.ns.cloudflare.com. 1 A 162.159.44.60
aarav.ns.cloudflare.com. 1 A 172.64.35.60
jill.ns.cloudflare.com. 1 AAAA 2606:4700:50:0:0:0:adf5:3a7a
jill.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c07a
jill.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:207a
aarav.ns.cloudflare.com. 1 AAAA 2606:4700:58:0:0:0:a29f:2c3c
aarav.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c33c
aarav.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:233c
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0