Apex domains cannot have CNAME records.
Question and response
Question
dig ODHSERVER.COM. NS
Answer
ODHSERVER.COM. 1 NS ns02.ODHSERVER.COM.
ODHSERVER.COM. 1 NS ns01.ODHSERVER.COM.
Authority
The response has no authority records.
Additional
ns01.odhserver.com. 1 A 18.223.14.48
ns02.odhserver.com. 1 A 18.223.31.206
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0