How to set Notifications Service Extension in xcode

Question

I'm using normal notifications service extension to auto increase notification number means that without using MORichNotification, CTNotificationService, or something else.

Just going to New -> target -> notification service extension -> create NotificationService -> active

Then, set NotificationService deployment target to 10.3 while project deployment target is 11.0

In FCM payload I set like:

{
    "to" : " device token/ firebase topic",
    "notification" : {
      "body" :  "body",
      "title" : "FCM Notification"
     },
    "mutable_content": true
  }

I also enable push notification in NotificationService target and Select it before run in my device but, still Unable to use Notification service extension.

Am I did something wrong? Should I use MORichNotification or anything like that?

Your help would be greatly appreciated