How to open subcategories of other categories while on the category page of OpenCart 3?

Question

opencart

Hello, tell me please, I display categories for an example according to the standard, as here is a standard example
, according to the standard, which category you are in from that category, subcategories are available and open, tell me, how can I open all subcategories of all categories while on the category page, I tried this method (it's certainly not the best, but it should have worked) file /template/extension/module/category.twig

<div class="col-md-3">
    <div class="shop-categor">
  {% for category in categories %}	
        <div class="shop-categor-item">
            <div class="shop-categor-title">{{ category.name }}
      <div class="shop-close">
        <span class="l1"></span>
        <span class="l2"></span>
      </div></div>
      {% for child in category.children %}
      <div class="shop-categor-wr">
                <label><a href="{{ child.href }}" >{{ child.name }}</a></label>
      </div>
      {% endfor %} 
        </div>
    {% endfor %}
    </div>	
</div>

but for some reason it does not work, everything is exactly on the category page, only subcategories of the current category are available.