'Firebase Cloud Notification shows 0 opens 0 clicks

I have integrated Firebase Cloud Notifications for Push Notifications in my iOS App written in Swift.

Although, the notifications are working as expected and I can see the Number of Deliveries, It doesn't show the Open Count and Click Count.

I have searched for similar questions on StackOverflow but none of them has been answered yet.

As you can see in the screenshot below, the number of sends is being tracked but not Open Count or other things.

Any Help is Appreciated.

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