Missing GPIO pins for 8/16 relay module

[GMAN]

I was excited to get my hands on Core and core 2 Boards, however for my projects I can't use M5 stack devices, as I need to control 8 or 16 relays. Its easy to do with ESP32 board, but can't do it with Core/Core 2 boards. Also very little explanation about pin out and what function they do. If you want to grow, you need to simplify learning process.