Delta between «before last_changed» and «last_changed»

Configuration
1

Is it possible to access device_tracker.my_device’s «for» state as we use it in automation’s trigger?
I’m trying to get delta between «before last_changed» and «last_changed» (trigger’s firing).
Using last_changed in notification, obviously always returns 0 seconds (cuz exactly this change has actually triggered the automation).

Something like this:

automation:
  - alias: test
    trigger:
      platform: state
      entity_id: input_boolean.test # Or device_tracker.xxx
    action:
      - service: persistent_notification.create
        data:
          # title: '{{ states.input_boolean.test.before_last_changed }}'
          # title: '{{ states.input_boolean.test.changed[1] }}' # History?
          title: '{{ states.input_boolean.test.for }}'

I’ve also tried this but that just returns what I’ve set in a trigger section:

automation:
  - alias: test
    trigger:
      platform: state
      entity_id: input_boolean.test
      to: 'on'
      for: '0:00:01'
    action:
      - service: persistent_notification.create
        data_template:
          message: '{{ trigger.for}}'

Thanks!