zola/test_site/themes/sample/templates/section-specific-extends.html

{% extends "index.html" %}
{% block content %}
    {{ section.relative_path | safe }}
    {% for sub in section.subsections %}
        {% set subsection = get_section(path=sub) %}
        {{subsection.title}}
        Sub-pages: {{subsection.pages | length}}
    {% endfor %}
{% endblock content %}