newsupernova/vendor/magento/module-downloadable/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\Catalog\Controller\Adminhtml\Product\Initialization\Helper">
        <plugin name="Downloadable" type="Magento\Downloadable\Controller\Adminhtml\Product\Initialization\Helper\Plugin\Downloadable" sortOrder="70" />
    </type>
    <type name="Magento\Catalog\Model\Product\CopyConstructor\Composite">
        <arguments>
            <argument name="constructors" xsi:type="array">
                <item name="downloadable" xsi:type="string">Magento\Downloadable\Model\Product\CopyConstructor\Downloadable</item>
            </argument>
        </arguments>
    </type>
    <virtualType name="Magento\Catalog\Ui\DataProvider\Product\Form\Modifier\Pool">
        <arguments>
            <argument name="modifiers" xsi:type="array">
                <item name="downloadable" xsi:type="array">
                    <item name="class" xsi:type="string">Magento\Downloadable\Ui\DataProvider\Product\Form\Modifier\Composite</item>
                    <item name="sortOrder" xsi:type="number">20</item>
                </item>
            </argument>
        </arguments>
    </virtualType>
    <type name="Magento\Downloadable\Ui\DataProvider\Product\Form\Modifier\Composite">
        <arguments>
            <argument name="modifiers" xsi:type="array">
                <item name="downloadablePanel" xsi:type="string">Magento\Downloadable\Ui\DataProvider\Product\Form\Modifier\DownloadablePanel</item>
                <item name="links" xsi:type="string">Magento\Downloadable\Ui\DataProvider\Product\Form\Modifier\Links</item>
                <item name="samples" xsi:type="string">Magento\Downloadable\Ui\DataProvider\Product\Form\Modifier\Samples</item>
                <item name="usedDefault" xsi:type="string">Magento\Downloadable\Ui\DataProvider\Product\Form\Modifier\UsedDefault</item>
            </argument>
        </arguments>
    </type>
    <virtualType name="Magento\Catalog\Ui\BaseAllowedProductTypes">
        <arguments>
            <argument name="productTypes" xsi:type="array">
                <item name="downloadable" xsi:type="string">downloadable</item>
            </argument>
        </arguments>
    </virtualType>
</config>