@colythdev the StickCPlus2 is a significant upgrade from the StickC, but easy to modify your code to suit.

https://github.com/m5stack/M5StickCPlus2/tree/master/examples

You can compare these M5StickCPlus2 basic sketches to the M5StickC.

Mostly, using this include helps:

#include "M5StickCPlus2.h"