Why is Twig Tweak required?

The Twig Tweak and Token module dependencies are required for the token_replace filter → used in the menu--disclosure.html.twig template file:

    {% if menu_disclosure_button_include_label %}
      <span>{{ menu_disclosure_button_label|token_replace() }}</span>
    {% endif %}
...
                {% if global_context.disclosure_button_include_label == 1 %}
                  <span>
                    {{ global_context.disclosure_button_label|token_replace(
                        {'menu-link': item['original_link'] }
                    )}}
                  </span>
                {% else %}

This allows site builders to utilize site tokens in the menu disclosure button label and menu link tokens in the sub-menu disclosure button labels. By default, the latter label is More "{{item.title}}" pages, but site builders may want to alter that label text while keeping the respective menu link title, which they can do with the token [menu-link:title] in the Disclosure Menu Block Configuration Form.