If your error has something to do with the "ADC1_GPIO35_CHANNEL not defined" error I got, then you can "simply" insert this
#include "soc/adc_channel.h"
into the
\Documents\Arduino\libraries\M5EPD\src\M5EPD.cpp.
I wrote this in a new line (line 4)
It's caused by a change from espressif 3.3 to 4.4.
Have fun, undefined