Ionic FirebasePush Notification Received but not Showing on IOS

Hi, I’m sending push notification through firebase cloud messaging. On android it’s working fine but on ios not. on the Xcode console I see that the message is received but nothing is shown. on iPhone when I go to setting of my app I cant find notification page.
I have already set all certificate

my code

async getToken(user) {
    let token;
    if (this.platform.is('android')) {
      token = await this.firebase.getToken();
    }

    if (this.platform.is('ios')) {
      token = await this.firebase.getToken();
      await this.firebase.grantPermission();
    }
    
    this.saveToken(token, user);
  }