Apex domains cannot have CNAME records.
Question and response
Question
dig cctld.uz. NS
Answer
cctld.uz. 5 NS ns.uz.
cctld.uz. 5 NS ns7.uz.
cctld.uz. 5 NS ns3.uz.
cctld.uz. 5 NS ns2.uz.
Authority
The response has no authority records.
Additional
ns2.uz. 127297 A 83.221.179.222
ns3.uz. 127297 A 185.74.6.29
ns7.uz. 127297 A 72.167.34.137
ns3.uz. 127297 AAAA 2a05:45c7:e001:0:0:0:0:4
ns7.uz. 127297 AAAA 2603:3:6101:8ac0:0:0:0:0
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0