Apex domains cannot have CNAME records.
Question and response
Question
dig biodecomateriaux.com. NS
Answer
biodecomateriaux.com. 5 NS ns2.biodecomateriaux.com.
biodecomateriaux.com. 5 NS ns1.biodecomateriaux.com.
Authority
The response has no authority records.
Additional
ns1.biodecomateriaux.com. 5 A 51.195.190.133
ns2.biodecomateriaux.com. 5 A 51.77.100.177
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0