Apex domains cannot have CNAME records.
Question and response
Question
dig softdebut.com. NS
Answer
softdebut.com. 2 NS tegan.softdebut.com.
softdebut.com. 2 NS neil.softdebut.com.
Authority
The response has no authority records.
Additional
neil.softdebut.com. 2 A 162.159.6.218
tegan.softdebut.com. 2 A 162.159.7.137
neil.softdebut.com. 2 AAAA 2400:cb00:2049:1:0:0:a29f:6da
tegan.softdebut.com. 2 AAAA 2400:cb00:2049:1:0:0:a29f:789
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0