elecrow 5 inch esp32 board -- external buttons via GPIO and UART0 ports?

I am working on making my 5 inch ESP32 board into a little display that uses two external classic video-game arcade buttons as part of the user interface. I would like to connect these to the board via the GPIO or UART0 ports, using the crow connector cables. My questions are:

1) What pins do the GPIO and UART0 ports correspond to?

2) Is there a way to tie these pins high or low, to avoid the need for an external pullup (or pulldown) resistor?

I would very much appreciate a small example code snippet or other reference.

Many thanks!


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