Apex domains cannot have CNAME records.
Question and response
Question
dig serverwp.cloud. NS
Answer
serverwp.cloud. 4 NS rita.ns.cloudflare.com.
serverwp.cloud. 4 NS will.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0