Apex domains cannot have CNAME records.
Question and response
Question
dig plesk.page. NS
Answer
plesk.page. 4 NS ns2.pdns.tech.
plesk.page. 4 NS ns1.pdns.tech.
plesk.page. 4 NS ns3.pdns.tech.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0