Apex domains cannot have CNAME records.
Question and response
Question
dig sensorpro.app. NS
Answer
sensorpro.app. 5 NS suzanne.ns.cloudflare.com.
sensorpro.app. 5 NS syeef.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
syeef.ns.cloudflare.com. 1 A 108.162.195.238
syeef.ns.cloudflare.com. 1 A 162.159.44.238
syeef.ns.cloudflare.com. 1 A 172.64.35.238
suzanne.ns.cloudflare.com. 1 A 108.162.194.87
suzanne.ns.cloudflare.com. 1 A 162.159.38.87
suzanne.ns.cloudflare.com. 1 A 172.64.34.87
syeef.ns.cloudflare.com. 1 AAAA 2606:4700:58:0:0:0:a29f:2cee
syeef.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c3ee
syeef.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:23ee
suzanne.ns.cloudflare.com. 1 AAAA 2606:4700:50:0:0:0:a29f:2657
suzanne.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c257
suzanne.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:2257
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0