Apex domains cannot have CNAME records.
Question and response
Question
dig openwave.ai. NS
Answer
openwave.ai. 5 NS ns3.openwave.ai.
openwave.ai. 5 NS ns1.openwave.ai.
openwave.ai. 5 NS ns2.openwave.ai.
Authority
The response has no authority records.
Additional
ns1.openwave.ai. 5 A 129.80.4.142
ns2.openwave.ai. 5 A 150.230.114.126
ns3.openwave.ai. 5 A 155.248.171.84
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0