Here is a jQuery solution for a WooCommerce accordion style menu for the product category menu that can be assigned with a WooCommerce widget, the menu works best when all product categories are assigned to a parent category.
The Accordion menu will then expand and collapse on click with the first parent category appearing expanded, the count span also has a link to the child category archive page. I have come across the original code (which I have modified) on a site with no credit/author reference.
The toggle icons have been marked up with FontAwesome5 regular free icons, so either have that loaded or change the markup for something else.
