WooCommerce : WP_Query mostrar productos

<div class="container">

<div class="products">
 <div class="row">
    <?php
    
        $args = array(
            'post_type' => 'product',
            'posts_per_page' => 12
            );
        $loop = new WP_Query( $args );
        if ( $loop->have_posts() ) {
            while ( $loop->have_posts() ) : $loop->the_post();
                wc_get_template_part( 'content', 'product' );
            endwhile;
        } else {
            echo __( 'No products found' );
        }
        wp_reset_postdata();
    ?>
</div>
</div>
</div>

Codigo Completo -- single-product.php

<?php
/**
 * The Template for displaying all single products
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/single-product.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see         https://woo.com/document/template-structure/
 * @package     WooCommerce\Templates
 * @version     1.6.4
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

get_header( 'shop' ); ?>

	<?php
		/**
		 * woocommerce_before_main_content hook.
		 *
		 * @hooked woocommerce_output_content_wrapper - 10 (outputs opening divs for the content)
		 * @hooked woocommerce_breadcrumb - 20
		 */
		do_action( 'woocommerce_before_main_content' );
	?>
	



<div class="container">

<div class="products">
 <div class="row">
    <?php
    
        $args = array(
            'post_type' => 'product',
            'posts_per_page' => 12
            );
        $loop = new WP_Query( $args );
        if ( $loop->have_posts() ) {
            while ( $loop->have_posts() ) : $loop->the_post();
                wc_get_template_part( 'content', 'product' );
            endwhile;
        } else {
            echo __( 'No products found' );
        }
        wp_reset_postdata();
    ?>
</div>
</div>
</div>


<?php
get_footer( 'shop' );

/* Omit closing PHP tag at the end of PHP files to avoid "headers already sent" issues. */

Resultado :