Pin mapping to actual pins

I’ve read this page GPIO | Khadas Documentation and see two buses with 11 and 100 pins. However how do I identify which pins in this mapping relate to the actual pin numbers?

I am trying to export I2C_SCK_A (PIN 22) and I2C_SDA_A (PIN 23)

My ultimate goal is use the pca9685 servo control board. If there is already a library or way to adjust the rpi.gpio library that would be easier. Otherwise I was going to try to adapt this one GitHub - vitiral/gpio: python gpio module for linux using the sysfs file access (/sys/class/gpio). Mimics similar Raspberry Pi IO libraries

I wrote some notes here on getting this working on a vim3 VIM3 I2C Python Example