This WordPress code snippet change de order of the woocommerce product tabs in products pages.

woocommerce_order_product_tabs.php

/**
 * This WordPress code snippet change de order of the woocommerce product tabs in products pages.
 *
 * Author: Oscar Abad Folgueira
 * Author URI: http://www.oscarabadfolgueira.com
 *
 * You can copy this snippet and paste in your functions.php or you can build your own plugin.
 */
 
add_filter( 'woocommerce_product_tabs', 'oaf_wc_change_tabs_order', 20 );

// function that set the order of the tabs.
function oaf_wc_change_tabs_order( $tabs ) {
    $tabs['reviews']['priority'] = 5;
    $tabs['description']['priority'] = 10;
    
    return $tabs;
}