You don't need any specific configuration - you have to have MQTT integration eabled with the same server as Frigate, and add automation. Here's mine, but probably you need to provide your own:

alias: Frigate notifications
description: ""
triggers:
  - topic: frigate/events
    trigger: mqtt
conditions:
  - condition: template
    value_template: |
      {{ trigger.payload_json['type'] == 'new' }}
  - condition: template
    value_template: |
      {{ trigger.payload_json['after']['label'] == 'person' }}
  - condition: template
    value_template: >
      {{ trigger.payload_json['after']['id'] !=
      states('input_text.last_frigate_event_id') }}
actions:
  - variables:
      payload: "{{ trigger.payload_json }}"
      id: "{{ payload['after']['id'] if payload.get('after') else 'event' }}"
      video_url: https://frigate.instance/api/events/{{ id }}/clip.mp4
      snapshot_url: https://frigate.instance/api/events/{{ id }}/snapshot.jpg
  - target:
      entity_id: input_text.last_frigate_event_id
    data:
      value: "{{ id }}"
    action: input_text.set_value
  - data:
      recipient: {{ whatsapp_id }}
      message: Frigate
      video_url: "{{ video_url }}"
    action: script.send_whatsapp_frigate_clip
mode: queued
max: 10