# vars_test.yml
- hosts: k3
  remote_user: user
  roles:
    - role: vars_test
  vars:
    settings: "{{ settings_all | combine(settings_host, recursive=true) }}"

# Результат
- debug:
    var: settings
    
ok: [k3.workgroup] => {
    "settings": {
        "group": "Admins",
        "mood": "Frustrated",
        "status": "Divorced",
        "user": "Kolya"
    }
}