Don't get Push Notification in iOS but see the generated token, cordova phonegap push plugin

Ionic Framework ionic-v3
1

Ionic version:
2.23

Cordova version
7.0.1

I’m submitting an issue which is related to IONIC PUSH NOTIFICATION using cordova phonegap plugin

Current behavior:
In android working fine eg. getting push notification. But in iOS do not get the notification, but in alert I see the generated token.

Expected behavior:
iOS devices should get the notification as well

export class MyApp {
rootPage = HomePage;

constructor(platform: Platform, public push: Push) {
platform.ready().then(() => {
StatusBar.styleDefault();
Splashscreen.hide();

  this.push.register().then((t: PushToken) => {
    return this.push.saveToken(t);
  }).then((t: PushToken) => {
   alert('Token saved:'+t.token);
  });

  this.push.rx.notification()
  .subscribe((msg) => {
    console.log('I received awesome push: ' + msg);
  });
});

}
}

I believe I have properly created security certificates which I have uploaded to app.ionic profiles
and all other steps followed very carefully.