Notification on Galaxy Watch (tizen) does not display icon

Question

I have simple application that sends notifications, which I want to show on Samsung Watch (Active 2). The notification itself is shown on watch, but I cannot get Icon to be displayed. Here is example of notification from gmail and from my app. On gmail (left) you can see icon of the app, while on the right you cannot. What am I missing?

notification-shown

Relevant code I use is below:

    int notificationId = 001;
    Bitmap bIcon = BitmapFactory.decodeResource( getResources(),R.drawable.ic_stat_ic_notification);

    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId)
            .setSmallIcon(R.drawable.ic_stat_ic_notification)
            .setLargeIcon(bIcon)
            .setContentTitle(title)
            .setContentText(message)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);

    NotificationCompat.WearableExtender wearableExtender =
            new NotificationCompat.WearableExtender().setContentAction(0);

    notificationBuilder.extend(wearableExtender);

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel(channelId,
                "Home Notifier",  NotificationManager.IMPORTANCE_DEFAULT);
        notificationManager.createNotificationChannel(channel);
    }

    notificationManager.notify(notificationId /* ID of notification */, notificationBuilder.build());