And if not working?

Configuration
5

The condition you need should check if you (person.greg) were previously not_home and that you weren’t home for more than 10 minutes.

To accomplish all of that, it needs to use the information available in the trigger variable (which is generated after your automation’s State Trigger fires).

The trigger variable contains information about person.greg before and after it changed state (in its from_state and to_state properties, respectively).

A Template Condition is needed for this purpose.

conditions:
  - condition: template
    value_template: >
      {{ trigger.from_state.state == 'not_home' and
        now() - trigger.from_state.last_updated > timedelta(minutes=10) }}

References

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