GPIO pin definitions ...
The LCD is a 320x240 touch screen. It uses a ST7789. The backlight has a range of level from 0 to 15. The supplied examples used the Arduino GFX library or the TFT_eSPI library. Neither worked without extra work, so I used the Adafruit GFX library which I find simple and clear to configure. Thanks Adafruit.
The keyboard example worked out of the box.
The touch example worked out of the box.
The simple tone example worked out of the box.