Apex domains cannot have CNAME records.
Question and response
Question
dig valex.cloud. NS
Answer
valex.cloud. 5 NS tiffany.ns.cloudflare.com.
valex.cloud. 5 NS ricardo.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0