Side Bar Categories

That would require custom code.

I roughly did the coding. Try the below code in WP Admin > Divi > Theme Options > Integration > Body Code & see if it works:

Code:

<style>
    .wc-block-product-categories-list--depth-1 {
        display: none;
    }
    .wc-block-product-categories-list--depth-0>li.open .wc-block-product-categories-list--depth-1 {
        display: block;
    }
</style>
<script>
    jQuery(document).ready(function($) {
        $('.wc-block-product-categories-list--depth-0>li').click(function(e) {
            if ($(this).find('li').length > 0) {
                e.preventDefault();
                $(this).toggleClass('open');
            }
        });
    });
</script>

 

Try the below instead & see if it works:

Code:

<style>
    .wc-block-product-categories-list--depth-0, .wc-block-product-categories-list-item.open>ul{
        display: block!important;
    }
    .wc-block-product-categories-list {
        display: none;
    }
</style>
<script>
    jQuery(document).ready(function($) {
        $('.wc-block-product-categories-list-item>a').click(function(e) {
            if ($(this).parent().find('li').length > 0) {
                e.preventDefault();
                $(this).parent().toggleClass('open');
            }
        });
    });
</script>

 

Try the below & see if it works:

Code:

<script>
jQuery(function($) {
      // Get the text of .woocommerce-products-header__title
      var pageTitle = $('.woocommerce-products-header__title.page-title').text().trim();

      // Find matching elements in .wp-block-woocommerce-product-categories
      $('.wp-block-woocommerce-product-categories .wc-block-product-categories-list-item__name').each(function() {
        var categoryText = $(this).text().trim();

        // Check for text match
        if (pageTitle === categoryText) {
          // Find closest parents and add 'open' class
          $(this).closest('.wc-block-product-categories-list-item')
            .closest('.wc-block-product-categories-list-item')
            .addClass('open');
        }
      });
});
</script>