Filter/Customize the Order number for Chase Paymentech WooCommerce XML API Gateway by Routy Development to append the last 4 numbers of the WooCommerce Order ID.

functions.php

function rd_set_custom_order_id_for_chase_paymentech( $order_id, $order )  {
    return uniqid() . '-' . substr($order->get_id(), -4);
}

add_filter( 'chase_paymentech_gateway_transaction_order_id', 'rd_set_custom_order_id_for_chase_paymentech', 10, 2 );