Apex domains cannot have CNAME records.
Question and response
Question
dig milkywan.cloud. NS
Answer
milkywan.cloud. 5 NS ns1.milkywan.fr.
milkywan.cloud. 5 NS ns3.milkywan.fr.
milkywan.cloud. 5 NS ns2.milkywan.fr.
milkywan.cloud. 5 NS ns4.milkywan.fr.
Authority
The response has no authority records.
Additional
ns1.milkywan.fr. 5 A 80.67.167.72
ns2.milkywan.fr. 5 A 193.106.119.27
ns3.milkywan.fr. 5 A 185.212.224.12
ns4.milkywan.fr. 5 A 194.9.173.111
ns1.milkywan.fr. 5 AAAA 2a0b:cbc0:1100:10:0:0:0:1
ns2.milkywan.fr. 5 AAAA 2001:67c:1740:9007:0:0:0:27
ns3.milkywan.fr. 5 AAAA 2a0b:7cc0:1:0:0:0:1000:19
ns4.milkywan.fr. 5 AAAA 2a04:ecc0:4:0:0:0:0:9999
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0