{# Keep track of the outer field #}
{% set dateField = field %}

{% fieldtag 'subFieldRows' %}
    {% for row in field.getRows(false) %}
        {% fieldtag 'subFieldRow' %}
            {% for field in row.getFields(false) %}
                {# Only display one field - the first one enabled #}
                {% if loop.first %}
                    {# Update the namespace for the field #}
                    {% do field.setParentField(dateField) %}

                    {% set dateValue = value ? (value | date('Y-m-d H:i:s', false)) : null %}

                    {{ craft.formie.renderField(form, field, {
                        value: dateValue ?? null,
                        inputName: 'datetime',
                    }) }}
                {% endif %}
            {% endfor %}
        {% endfieldtag %}
    {% endfor %}
{% endfieldtag %}