You will replace in your existing code the following block:
add_action( 'woocommerce_checkout_order_review', 'reordering_checkout_order_review', 1 );
function reordering_checkout_order_review(){
remove_action('woocommerce_checkout_order_review','woocommerce_checkout_payment', 20 );
add_action( 'woocommerce_checkout_order_review', 'custom_checkout_payment', 8 );
add_action( 'woocommerce_checkout_order_review', 'custom_checkout_place_order', 20 );
}
By this code block (keeping the 2 other functions):
add_action( 'woocommerce_checkout_order_review', 'reordering_checkout_order_review', 1 );
function reordering_checkout_order_review(){
remove_action('woocommerce_checkout_order_review','woocommerce_checkout_payment', 20 );
add_action( 'woocommerce_checkout_order_review', 'custom_checkout_payment', 8 );
add_action( 'woocommerce_checkout_order_review', 'after_custom_checkout_payment', 9 );
add_action( 'woocommerce_checkout_order_review', 'custom_checkout_place_order', 20 );
}
function after_custom_checkout_payment() {
?>
<div id="before-order-table" class="woocommerce-checkout-custom-text">
<h3><?php _e("Your order", "woocommerce"); ?></h3>
<p><?php _e("I have accepted the terms and bla bla bla", "woocommerce"); ?></p>
</div>
<?php
}
Code goes in function.php file of your active child theme (or active theme). Tested and works.