A few months ago, I launched an ESP32 dev board I designed & developed. It's called the ESP32-S3 PowerFeather, and it's focused towards low-power, lipo/li-ion & solar powered projects.
It uses the I2C-controllable Texas Instruments BQ25628E as the charger IC, and has an on-board Onsemi LC709204F battery fuel gauge, giving users tons of power management and monitoring capabilities. I've provided an open-source helper library, called PowerFeather-SDK, to help users use these power-related capabilities. It's compatible with both Arduino and ESP-IDF:https://github.com/PowerFeather/powerfeather-sdk
I've created a demo app for the board and SDK, and wrote about it on Hackster.io:
https://www.hackster.io/powerfeatherdev/esp32-s3-powerfeathe...
There is also further documentation on:
https://docs.powerfeather.dev/
Please do check it out and let me know what you think.