Apex domains cannot have CNAME records.
Question and response
Question
dig 2cloud.eu. NS
Answer
2cloud.eu. 2 NS chuck.ns.cloudflare.com.
2cloud.eu. 2 NS teagan.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
chuck.ns.cloudflare.com. 1 A 108.162.193.86
chuck.ns.cloudflare.com. 1 A 172.64.33.86
chuck.ns.cloudflare.com. 1 A 173.245.59.86
teagan.ns.cloudflare.com. 1 A 108.162.194.174
teagan.ns.cloudflare.com. 1 A 162.159.38.174
teagan.ns.cloudflare.com. 1 A 172.64.34.174
chuck.ns.cloudflare.com. 1 AAAA 2606:4700:58:0:0:0:adf5:3b56
chuck.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c156
chuck.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:2156
teagan.ns.cloudflare.com. 1 AAAA 2606:4700:50:0:0:0:a29f:26ae
teagan.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c2ae
teagan.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:22ae
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0