Cellular data issue in iPad with OS 15.4 and above

In iPad with OS 15.4 and above, after removing the SIM card, cellular network data shows enable and the device returns some default Network values (which are wrong than the actual values):

Network provider name : "CTRadioAccessTechnologyLTE" (4G Network)
CTCarrier { Carrier name: [iPad] 
Mobile Country Code: [234] 
Mobile Network Code:[25] 
ISO Country Code:[gb] 
Allows VOIP? [YES] }

I am using CoreTelephony to get the above data.

Steps to reproduce the issue:

1. Remove SIM from iPad.
2. Toggle Cellular data in the Settings from ON to OFF and reverted to ON.

Root Cause of the issue:

1. The device considers as a SIM is available even though it is not inserted.