Apex domains cannot have CNAME records.
Question and response
Question
dig kereval.cloud. NS
Answer
kereval.cloud. 5 NS ns11.ovh.net.
kereval.cloud. 5 NS dns11.ovh.net.
Authority
The response has no authority records.
Additional
ns11.ovh.net. 5 A 5.39.27.169
dns11.ovh.net. 5 A 5.135.86.61
ns11.ovh.net. 5 AAAA 2001:41d0:b00:d000:0:0:0:2
dns11.ovh.net. 5 AAAA 2001:41d0:d00:f000:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0