newsupernova/vendor/magento/module-inventory-shipping-admin-ui/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="controller_action_predispatch_adminhtml_order_shipment_new">
        <observer name="inventory_shipping_check_data_before_load_new_shipment" instance="Magento\InventoryShippingAdminUi\Observer\NewShipmentLoadBefore"/>
    </event>
</config>