Apex domains cannot have CNAME records.
Question and response
Question
dig sjsapp.edu.do. NS
Answer
sjsapp.edu.do. 5 NS ns2022.banahosting.com.
sjsapp.edu.do. 5 NS ns2021.banahosting.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0