HomeKit Doorbell Camera

I’ve setup a HomeKit Doorbell Camera (actually it’s a static image using the Generic Camera integration, but I don’t believe that’s relevant)

homekit:
  - name: "HomeKit Bridge"
    filter:
      include_entities:
        - camera.door
    entity_config:
      camera.door:
        name: "Front Door"
        support_audio: false
        linked_doorbell_sensor: binary_sensor.ring_doorbell

There is a button exposed to Homekit as part of the camera, but it’s not clear to me what it’s for. Any suggestions?