Hello,
You can copy related.php (xstore/woocommerce/single-product) to xstore-child/woocommerce/single-product and make such changes https://prnt.sc/iwgubc:
$cats_array = wp_get_post_terms($product->get_id(),'product_cat',array('fields'=>'ids')); $args = apply_filters( 'woocommerce_related_products_args', array( 'post_type' => 'product', 'ignore_sticky_posts' => 1, 'no_found_rows' => 1, 'posts_per_page' => $posts_per_page, 'orderby' => $orderby, 'post__in' => $related, 'post__not_in' => array( $product->get_id() ), 'tax_query' => array( array( 'taxonomy' => 'product_cat', 'field' => 'id', 'terms' => $cats_array ) ) ) );
Regards
