check option value size for https://help.groupthought.com/article/346-add-more-colors-available-message-in-collection-grid-listings

option_value_size.liquid

{% unless product.has_only_default_variant %}
  {% for option in product.options_with_values %}
    {% assign downcased_option = option.name | downcase %}
      {% if downcased_option contains 'color' or downcased_option contains 'colour' %}
        {% if option.values.size > 1 %}
          {% assign is_color = true %}
             More {{ option.name }}s
          {% endif %}
      {% endif %}
  {% endfor %}
{% endunless %}