Display shopfiy collections selected from custom fields with their products

display-collections-and-products.liquid

{% for collection in collections %}

        {% if collection.metafields.custom_fields["display_on_collection_page"] == "men" %}

            <div>

                <h1>{{ collection.title }}</h1>

                {% for product in collection.products %}
                    <div>

                        <small>{{ product.title }}</small>

                    </div>
                {% endfor %}

            </div>

        {% endif %}

    {% endfor %}