Touch event callbacks

I need to know when a touch is released from the touch screen of an Android device.
I don’t wish to poll the Input system every frame.
I would like to register a listener to an OnTouchReleased event (or equivalent).
Is there anything like this or do I just have to check the touchCount every frame and react appropriately when that count changes (or something along those lines)?
Note, I am not using the new input system as it’s over engineered for what I’m doing.

Thank you for your time.