Hi Ardian,
most of the features of the rich notifications are only available for Android: icons, stack several notifications in a single notification, etc. I'm not an iOS native developer nor an iOS user so I'm not sure if it's possible to achieve something similar in iOS, but the plugin we use doesn't support it so I guess iOS doesn't.
One thing that iOS does support is adding buttons to the notification, but we don't support that in the app yet (neither for Android) because there were some issues in the plugin regarding that matter.
Cheers,
Dani