Apex domains cannot have CNAME records.
Question and response
Question
dig boal.tech. NS
Answer
boal.tech. 5 NS ns2.boal.tech.
boal.tech. 5 NS ns1.boal.tech.
Authority
The response has no authority records.
Additional
ns1.boal.tech. 5 A 108.174.197.139
ns2.boal.tech. 5 A 108.174.197.139
ns1.boal.tech. 5 AAAA 2607:5500:3000:6f3:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0