AC200L and B210 issue Not seeing battery in app

I just received the B210 battery for my AC200L , I attached with the correct aviation cable. Powered the AC200L then B210. I am not seeing the expansion battery in the app. I verified all connections . What am I missing?

Thanks

So the unit is maain AC200 L is fully charged and it won’t take anymore solar or grid power and the B210 battery is at 60%