content_planner-8.x-1.x-dev/modules/content_kanban/templates/content-kanban-column.html.twig

<td id="{{ column_id }}" data-state_id="{{ state_id }}" class="kanban-column droppable">{{ column }}
  {% if entities %}
    {% for entity in entities %}
      <div class="content-kanban-entry">
        {{ entity }}
      </div>
    {% endfor %}

  {% endif %}
</td>