Xiao eink expansion board with Waveshare 3.52inch e-Paper

I am trying to use the following components:

I cannot use the GxEPD2 to drive the screen as it does not support this screen size so I am trying to use the waveshare demo code for Arduino.

I can set the pins to match the driver board rather than Arduino. It is looking for EPD_PWR_PIN I am not sure what to set this at?

Has anyone been able to make this combination of screen and driver board work?