Switches do not show up as entities inside of HA, they trigger events.
If you go to the event page (looks like this, or like this in newer versions), on the right side you should see “Available Events” and under that heading there should be an event named “deconz_event”. If not, click the button on the switch to make the event occur at least once.
At the bottom of the page should be a place to to type an event to subscribe to, and a button to “start listening”. Enter “deconz_event” in the text box and click start listening. Then press the button. There are separate events for single, double, tripple, long clicks, etc. All possible events are listed here. Everything you need to use them in an automation is shown in the event that gets triggered.
To use them in automations, you do something like this:
trigger:
- platform: event
event_type: deconz_event
event_data:
id: laundry_room_switch
event: 1004