Apex domains cannot have CNAME records.
Question and response
Question
dig hkrelx.shop. NS
Answer
hkrelx.shop. 5 NS ns-1742.awsdns-25.co.uk.
hkrelx.shop. 5 NS ns-1514.awsdns-61.org.
hkrelx.shop. 5 NS ns-946.awsdns-54.net.
hkrelx.shop. 5 NS ns-2035.awsdns-62.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0