Under Umbrella Dashboard > Deployment > Mobile devices, the device label for iOS Cisco Security Connector will be set to default iPhone(Serial number) in iOS 16.
The change is due to security reasons in iOS 16. For more details, please continues to read this Apple article.
Affected customers can consider integrating Active Directory identities with the iOS CSC app: Add User Identity for Cisco Security Connector
This unmanaged Cisco Security Connector is not affected.