Pass output of action run_playbook in rulebook to another action

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Hello guys

I would like to pass the output of the action run_playbook in a rulebook to another playbook.

This is my rulebook:

---
- name: Listen for selfservice events on a webhook
  hosts: all

  sources:
    - ansible.eda.webhook:
        host: 0.0.0.0
        port: 5000
  
  rules:
    - name: Set maintenance page
      condition: events.payload.self_service == "maintenance_page"
      actions:
        - run_playbook:
            name: playbooks/maintenance_page.yml
            set_facts: true
            post_events: true
            json_mode: true
        - post_event:
            event:
               send_notification: true
    - name: Send notification
      condition: event.send_notification is defined and event.send_notification
      actions:
        - run_playbook:
            name: playbooks/notification.yml

The output of the playbook is written in json, but is it only visible on standard output?

What does the setting “post_events” in the action “run_playbook” do? Can I set the output of the first action in the action “post_event”?

Is there an easier way?

Thanks for any help.

Kind regards
Elmar