ESP32C3 supporting components is basically just following ESP32­C3 Family Hardware Design Guidelines. There's a footprint for 32kHz crystal, but since it's not supported in Arduino environment, also pins are broken out as GPIO.

Display power conditioning circuit is also provided in a datasheet from GooDisplay

Power section is designed to take in both USB and battery power. U5 is a boost converter and Q3 is responsible for disconnecting batteries when powered form USB and provide reverse polarity protection.


Power to I2C sensors is switched via transistor to save some Coulombs