Cụ thể đổi thẻ h2 xang h3

remove_action( ‘woocommerce_shop_loop_item_title’,’woocommerce_template_loop_product_title’, 10 );
add_action(‘woocommerce_shop_loop_item_title’, ‘abChangeProductsTitle’, 10 );
function abChangeProductsTitle() {
echo ‘<h3 class=”woocommerce-loop-product_title”>’ . get_the_title() . ‘</h3>’;
}

tham khảo: https://stackoverflow.com/questions/50979203/how-can-i-change-the-product-h2-in-woocommerce-storefront-to-h3