newsupernova/vendor/magento/module-inventory-configurable-product-admin-ui/etc/adminhtml/di.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:ObjectManager/etc/config.xsd">
    <type name="Magento\ConfigurableProduct\Ui\DataProvider\Product\Form\Modifier\Composite">
        <arguments>
            <argument name="modifiers" xsi:type="array">
                <item name="inventoryConfigurablePanel" xsi:type="string">Magento\InventoryConfigurableProductAdminUi\Ui\DataProvider\Product\Form\Modifier\InventoryConfigurablePanel</item>
            </argument>
        </arguments>
    </type>
    <type name="Magento\ConfigurableProduct\Block\Adminhtml\Product\Steps\Bulk">
        <plugin name="adapt_configurable_wizard_bulk_block_to_msi"
                type="Magento\InventoryConfigurableProductAdminUi\Plugin\Block\BulkStepChangeTemplate"/>
    </type>
    <type name="Magento\InventoryConfigurableProductAdminUi\Plugin\Block\BulkStepChangeTemplate">
        <arguments>
            <argument name="multiSourceTemplate" xsi:type="string">Magento_InventoryConfigurableProductAdminUi::catalog/product/edit/attribute/steps/bulk.phtml</argument>
        </arguments>
    </type>
    <type name="Magento\ConfigurableProduct\Block\Adminhtml\Product\Steps\Summary">
        <plugin name="adapt_configurable_wizard_summary_block_to_msi"
                type="Magento\InventoryConfigurableProductAdminUi\Plugin\Block\SummaryStepChangeTemplate"/>
    </type>
    <type name="Magento\InventoryConfigurableProductAdminUi\Plugin\Block\SummaryStepChangeTemplate">
        <arguments>
            <argument name="multiSourceTemplate" xsi:type="string">Magento_InventoryConfigurableProductAdminUi::catalog/product/edit/attribute/steps/summary.phtml</argument>
        </arguments>
    </type>
    <type name="Magento\ConfigurableProduct\Block\Adminhtml\Product\Edit\Tab\Variations\Config\Matrix">
        <plugin name="add_quantity_per_source_to_variations_matrix"
                type="Magento\InventoryConfigurableProductAdminUi\Plugin\Block\AddQuantityPerSourceToVariationsMatrix"/>
    </type>
</config>