I recently purchased the 3 key keybow set and was wondering if there was any way to use the keys as an input for the raspian OS on the Raspberry Pi which the HAT is connected to, rather than as an external keyboard. I have tried searching for a result and have yet to find a solution.
That should be doable. Just install Pi OS instead of the Keybow OS.
The pinout is here, that shows what GPIO the buttons use.
Keybow Mini at Raspberry Pi GPIO Pinout
Then figure out what you want the buttons to do.
As an example if you add the following to your config.txt, pressing button 1 will do a shutdown.
Other options are something with python.
import RPi.GPIO as GPIO
GPIO.setup(17, GPIO.IN, pull_up_down = GPIO.PUD_UP)
"your code here to be done when button pressed"
GPIO.add_event_detect(17, GPIO.FALLING, callback = ButtonOne, bouncetime = 2000)