ServiceSubscription - EID present only in any one of the sim slot response

In the given WWDC22 video, it is mentioned that if a slot is eSIM, then EID will be returned in that slot’s response.

Reference: https://developer.apple.com/videos/play/wwdc2022/10045/#:~:text=During%20WWDC%202021%2C%20we%20introduced,platform%20support%20and%20new%20features

Above video’s transcript text:

But when tested with iPhone 13 and iPhone 14 models, the ServiceSubscription response contains EID only in any one of the slots in ServiceSubscription query in DeviceInformation  

How can we know which SIM slot supports eSIM ? 

How can one know which slot’s IMEI should be given to network operator for configuring eSIM ?

ServiceSubscription - EID present only in any one of the sim slot response
 
 
Q