Apex domains cannot have CNAME records.
Question and response
Question
dig 2020sw.org. NS
Answer
2020sw.org. 5 NS ns-1253.awsdns-28.org.
2020sw.org. 5 NS ns-918.awsdns-50.net.
2020sw.org. 5 NS ns-1081.awsdns-07.org.
2020sw.org. 5 NS ns-1245.awsdns-27.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0