So I have received a call from Apple support. And at the beginning the support guy was not ready to accept that there should be any animations and sound while putting case on phone but I have explained him and showed him others examples who are having the sounds and animations as well then he agreed that yes animation should be there when screen is locked and you put the case. In my case nothing was happening in lock/unlocked screen so they told that there is some issue with the case and finally after 45 minutes of call the outcome was they are giving me replacement of the case.
As I have purchased the case from online Apple store so they will pickup this and deliver the new replacement case at my address.
Please note: I have purchased iPhone 12 mini magsafe leather.
Once I will receive new replacement case I will update as well if it is working or not. If it doesn’t then I will be replacing my phone itself.
”It is not about the problem with the case or anything. It’s just a thing that if there is a feature which others are getting on same phone and case then why I am not. After putting so much money in Apple products if I am not able to use any smallest feature then also I won’t accept it and I want replacement for that”