Xiao round display and ESP3c3 pin usage


I am using the round display with the esp3c3 and
I would like to know id there are pin(s) available to interface with external device??

(I know that I can use sda, sck for the IIC protocol). But, I am taking about unused pin of the esp32c3 (normally, all the pins are connected to the round display), thank

I wonder if I can find the resources you need here
带电池管理芯片的肖克格罗夫盾 |看工作室维基 (seeedstudio.com)