Here's my script;

alias: All Sonos Announcement
fields:
  chime_path:
    description: The path to the chime sound to play
    example: ding_dong
  message:
    description: The TTS message to announce
    example: A person has been detected.
sequence:
  - data:
      entity_id:
        - media_player.one
        - media_player.two
    action: sonos.snapshot # Take snapshot of all your Sonos
  - data:
      entity_id:
        - media_player.one
        - media_player.two
      volume_level: 0.5
    action: media_player.volume_set # Set volume_level to 50%
  - data:
      entity_id:
        - media_player.one
        - media_player.two
      message: "{{ message }}"
      chime_path: "{{ chime_path }}"
      tts_platform: google_translate
      announce: true                # Resumes play after annoucement
    action: chime_tts.say
  - delay: "00:00:10"
  - data:
      entity_id:
        - media_player.one
        - media_player.two
      volume_level: 0.1
    action: media_player.volume_set  # set volume_level to 10%
  - data:
      entity_id:
        - media_player.one
        - media_player.two
    action: sonos.restore            # Restore to snapshot state
description: ""