Touchscreen support - Question

[Frankstar]

so i was wondering if we have touchscreen support via mouse.

my testing program:

import mouse
import time

events = []
mouse.hook(events.append)
while 1:
    mouse._listener.queue.join()
    for event in events:
        print(event)
    del events[:]
    time.sleep(0.25)

and if i touch and release the touchscreen i get:

ButtonEvent(event_type='down', button='?', time=1664808330.854423)
ButtonEvent(event_type='up', button='?', time=1664808331.035416)

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now i tried to trigger a callback-function via mouse.on_button But it looks like this doesnt work - since button "?" is not implemented?