ds-site/Configuration/TCA/Overrides/sys_template.php

<?php

declare(strict_types=1);

use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;

(static function (string $extensionKey) {
    ExtensionManagementUtility::addStaticFile(
        $extensionKey,
        'Configuration/TypoScript/',
        $extensionKey
    );
})('ds_site');