newsupernova/vendor/magento/module-payment/etc/events.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="sales_order_save_before">
        <observer name="payment_sales_order_save_before" instance="Magento\Payment\Observer\SalesOrderBeforeSaveObserver" />
    </event>
    <event name="sales_order_status_unassign">
        <observer name="sales_order_status_update" instance="Magento\Payment\Observer\UpdateOrderStatusForPaymentMethodsObserver" />
    </event>
</config>