Hi Brenegan
I've attached the screen you'll see on your phone when learning a new sensor (without the sensor ID), you can simply activate the sensor with an activation tool and start the automatic process of "Learn tyre sensor".
Once you enter that function, you'll notice at the top that the current front and rear IDs are displayed at the top.
This can be done with your phone or a laptop, both share the same functionality.
Kind regards and safe travels
Ruan