ansible nested looping

# defaults/main.yml

config:
  - name: alice
    execStart: alice.sh
    retains:
      - name: blub
        time: 12:00
        value: 5
      - name: blib
        value: 6

# tasks/main.yml

- name: Loop all exec
  template:
    src: foo.j2
    dest: "{{ item.name }}"
  loop: "{{ config }}"
  
# templates/foo.j2
exec = {{ item.execStart }}
{% for i in item.retains %}
{{ i.name }} {{ i.time|default('00:00') }} {{ i.value }}
{% endfor %}