Add this to your child theme’s function.php:

add_filter( ‘woocommerce_product_tabs’, ‘function_remove_product_review’, 99);
function function_remove_product_review($tabs) {
unset($tabs[‘reviews’]);
return $tabs;
}

from: https://helloacm.com/how-to-remove-product-review-in-woocommercewordpress/