Apex domains cannot have CNAME records.
Question and response
Question
dig engineering.peak.org. NS
Answer
engineering.peak.org. 1 NS ns2.peak.org.
engineering.peak.org. 1 NS ns1.peak.org.
Authority
The response has no authority records.
Additional
ns1.peak.org. 1 A 69.59.201.8
ns2.peak.org. 1 A 142.11.245.64
ns2.peak.org. 1 AAAA 2607:5500:3000:d80:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0