woocommerce/includes/admin/meta-boxes/views/html-product-data-advanced.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
?>
<div id="advanced_product_data" class="panel woocommerce_options_panel hidden">

	<div class="options_group hide_if_external hide_if_grouped">
		<?php
			woocommerce_wp_textarea_input(
				array(
					'id'          => '_purchase_note',
					'value'       => $product_object->get_purchase_note( 'edit' ),
					'label'       => __( 'Purchase note', 'woocommerce' ),
					'desc_tip'    => true,
					'description' => __( 'Enter an optional note to send the customer after purchase.', 'woocommerce' ),
				)
			);
		?>
	</div>

	<div class="options_group">
		<?php
			woocommerce_wp_text_input(
				array(
					'id'                => 'menu_order',
					'value'             => $product_object->get_menu_order( 'edit' ),
					'label'             => __( 'Menu order', 'woocommerce' ),
					'desc_tip'          => true,
					'description'       => __( 'Custom ordering position.', 'woocommerce' ),
					'type'              => 'number',
					'custom_attributes' => array(
						'step' => '1',
					),
				)
			);
		?>
	</div>

	<?php if ( post_type_supports( 'product', 'comments' ) ) : ?>
		<div class="options_group reviews">
			<?php
				woocommerce_wp_checkbox(
					array(
						'id'      => 'comment_status',
						'value'   => $product_object->get_reviews_allowed( 'edit' ) ? 'open' : 'closed',
						'label'   => __( 'Enable reviews', 'woocommerce' ),
						'cbvalue' => 'open',
					)
				);
				do_action( 'woocommerce_product_options_reviews' );
			?>
		</div>
	<?php endif; ?>

	<?php do_action( 'woocommerce_product_options_advanced' ); ?>
</div>