Apex domains cannot have CNAME records.
Question and response
Question
dig casjay.app. NS
Answer
casjay.app. 3 NS dns1.casjay.app.
casjay.app. 3 NS dns.casjay.app.
casjay.app. 3 NS dns2.casjay.app.
Authority
The response has no authority records.
Additional
dns.casjay.app. 3 A 82.29.128.43
dns1.casjay.app. 3 A 103.124.104.139
dns2.casjay.app. 3 A 103.124.105.192
dns.casjay.app. 4 AAAA 2402:d0c0:12:47ab:0:0:0:1
dns1.casjay.app. 4 AAAA 2402:d0c0:15:87:0:0:f7f3:b529
dns2.casjay.app. 4 AAAA 2402:d0c0:14:f:0:0:e337:1233
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0