XIAO nRF52840 & Wio-SX1262 Kit Battery Level

I just received my shipment of 3 XIAO nRF52840 & Wio-SX1262 Kits and have started playing with them. My first project was wiring up my first Harbor Breeze Node (60lm, 1W).

Digging further into the board, it seems that both it and it's ESP32S3 variant don't provide accurate voltage reading, and, I assume, battery level reporting. It has made me question whether I can actually tell how well my HB node is working and how stable it will be long term.

Furthermore, if the board isn't able to determine battery level or voltage, is it able to fully charge the battery without degrading it? Any insight into this is appreciated!