List Magento Product Name, ID and Sku in WordPress side metabox

magento-product-metabox.php

<?php 
function wpdocs_register_meta_boxes() {
    add_meta_box( 'product-list-box', __( 'Product List', 'textdomain' ), 'product_list_callback', 'articles','side' );
}
add_action( 'add_meta_boxes', 'wpdocs_register_meta_boxes' );

function product_list_callback(){ ?>
	<select name="product_list[]" multiple>
		<?php 
			global $wpdb, $post;
			$post_list = get_post_meta($post->ID, 'product_list',true );
			print_r( $post_list );
			$results = $wpdb->get_results("SELECT
			    catalog_product_entity_varchar.entity_id,
			    catalog_product_entity_varchar.`value` AS product_name,
			    catalog_product_entity.sku
			FROM
			    catalog_product_entity_varchar
			INNER JOIN catalog_product_entity ON catalog_product_entity_varchar.entity_id = catalog_product_entity.entity_id
			WHERE
			    catalog_product_entity_varchar.entity_type_id = (
			        SELECT
			            entity_type_id
			        FROM
			            eav_entity_type
			        WHERE
			            entity_type_code = 'catalog_product'
			    )
			AND catalog_product_entity.type_id = 'configurable'
			AND attribute_id = (
			    SELECT
			        attribute_id
			    FROM
			        eav_attribute
			    WHERE
			        attribute_code = 'name'
			    AND entity_type_id = (
			        SELECT
			            entity_type_id
			        FROM
			            eav_entity_type
			        WHERE
			            entity_type_code = 'catalog_product'
			    )
			) ORDER BY product_name");
		?><option value="">Select Multiple Product</option>
		<?php foreach( $results as $product ): 
					$selected = in_array( $product->entity_id, $post_list ) ? 'selected="selected"' : "";
		?>
			}
			<?php echo '<option '.$selected.' value="'.$product->entity_id.'">'.$product->product_name.'</option>'; ?>
		<?php endforeach; ?>
	</select>
<?php }

/**
 * Save post metadata when a post is saved.
 *
 * @param int $post_id The post ID.
 * @param post $post The post object.
 * @param bool $update Whether this is an existing post being updated or not.
 */
function save_book_meta( $post_id, $post, $update ) {

    /*
     * In production code, $slug should be set only once in the plugin,
     * preferably as a class property, rather than in each function that needs it.
     */
    $post_type = get_post_type($post_id);

    // If this isn't a 'book' post, don't update it.
    if ( "articles" != $post_type ) return;

    // - Update the post's metadata.

    if ( isset( $_POST['product_list'] ) ) {
        update_post_meta( $post_id, 'product_list', $_POST['product_list'] );
    }

}
add_action( 'save_post', 'save_book_meta', 10, 3 );