Corel Painter and iPad


I am trying to understand what I need to do to make Pencil 2 work properly with Corel Painter 2019 using a 2018 iPad Pro 12.9 on an iMac linked through Astropad. There is only one Tablet preference in Painter for Wacom, but the Wacom file in the Apple System Preferences does not recognize the iPad as a tablet to add. Does anyone know whether the Wacom preference in Painter should be turned on or off? How come I can’t use the Touch gestures the way I can with, say, Rebelle 3 or Photoshop in the same situation?