Hello,
This plugin is just for 10-50 categories.
If you need it for make and model selection there is another plugin.
If there is a great number of products try to replace the code:
$args = array('orderby' => 'parent', 'order' => 'DESC', 'fields' => 'all');
$ids = wc_get_products(array('return' =>'ids', 'limit' => -1));
$productCategories = wp_get_object_terms($ids, $taxonomy, $args); // only get categories that have products
with:
$productCategories = get_terms($taxonomy, array('fields' => 'all', 'hide_empty' => 1, 'orderby' => 'name'));
in the file:
wp-content/plugins/product-category-dropdowns/Block/Selector.php
Stanislav