Ask @xaviml to add it to his app, I’m almost sure he will be happy to add new devices to his app
But why do you want to create a sensor for each remote and not just use the events directly in your automations? Or do you know some Python, thencreate the automation directly in AppDaemon. Seems like an unnecessary extra step.
If you are interested in integrating this device into ControllerX, you can also report the events that the button send in here and then I can add the device and give it a default behaviour or you can also already use Custom Controllers to give the behavior that you wish.
The switch is not fully supportet in Deconz and the API. so to handle it, im just for self help and learning createt sensor for folowing up the state changes and createt an viritual switch (sensor) in HA that holds values that i use in automations.