editorjs-2.x-dev/templates/ce-block--table.html.twig

<div class="ce-block__content ce-table__wrap">
  <table class="ce-table">
    <tbody>
    {% for row in data.content %}
      <tr>
        {% for cell in row %}
          <td class="ce-table__cell"><div class="ce-table__area">{{ cell }}</div></td>
        {% endfor %}
      </tr>
    {% endfor %}
    </tbody>
  </table>
</div>