Motion detector with timer

Configuration
4

Yeah that’s the way to do it (though I would recommend not using device triggers and actions). There used to be an example like this in the docs (it is a common question);

automation:
- alias: Turn on kitchen light when there is movement
  trigger:
    platform: state
    entity_id: sensor.motion_sensor
    to: 'on'
  action:
    service: homeassistant.turn_on
    entity_id: light.kitchen_light

- alias: Turn off kitchen light 10 minutes after last movement
  trigger:
    platform: state
    entity_id: sensor.motion_sensor
    to: 'off'
    for:
      minutes: 10
  action:
    service: homeassistant.turn_off
    entity_id: light.kitchen_light

I’m sure there are automation blueprints for this too if you search.