Apple Inc. Magic Trackpad 2 One touchpad, two devices

Support
1

└[12:08:22]{10}$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech Gaming Mouse G502 Keyboard id=11 [slave pointer (2)]
⎜ ↳ Logitech Gaming Mouse G502 id=10 [slave pointer (2)]
⎜ ↳ Apple Inc. Magic Trackpad 2 id=12 [slave pointer (2)]
⎜ ↳ Apple Inc. Magic Trackpad 2 id=13 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Power Button id=7 [slave keyboard (3)]
↳ Eee PC WMI hotkeys id=14 [slave keyboard (3)]
↳ Logitech Gaming Mouse G502 Keyboard id=15 [slave keyboard (3)]
↳ HID 046a:0011 id=8 [slave keyboard (3)]
↳ C-Media Electronics Inc. USB Audio Device id=9 [slave keyboard (3)]

After testing, I can only use the device with id 12
How should I remove more than devices

2

Though typically it’s useful as your device may be able to act differently, but if you want to disable one:

$ xinput set-prop <id> 'Device Enabled' 0

in case the name is not ‘Device Enabled’ somehow, query the properties with:

$ xinput list-props <id>

and find out which one sounds similar.