With this plugin, newly written WooCommerce product reviews will be in a pending (hold) status until manually approved.
Product reviews in WooCommerce are immediately available for everyone to see (this can’t be changed without this plugin). WooCommerce ignores the WordPress «comment must be manually approved» discussion setting. With this plugin, new product reviews must be manually reviewed and approved before being visible on the front-end.
Te puedes descargar este plugin para utilizarlo en tu instalación autoalojada de WordPress.