Activate reviews for all products in WooCommerce (bulk)

Activate ratings for all products programmatically with the following code:

add_action('admin_init', 'iphf_enable_reviews');

function iphf_enable_reviews() {

    $args = array(
        'post_type'   => 'product',
        'numberposts' => -1,
        'comment_status' => 'closed',
        'post_status' => 'publish',
    );

    $shop_products = get_posts( $args );
    foreach( $shop_products as $item){
        $product = new WC_Product($item->ID);
        wp_update_post( array(
            'ID'    => $item->ID,
            'comment_status' => 'open',
        ) );
    }
}

Paste this code into functions.php or use it as a plugin and open the admin panel once. After that, all products should have ratings (reviews) enabled. The code can then be removed again.