Apex domains cannot have CNAME records.
Question and response
Question
dig dsau.co. NS
Answer
dsau.co. 2 NS ines.ns.cloudflare.com.
dsau.co. 2 NS tony.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0