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