ext_localconf.php

<?php

defined('TYPO3_MODE') || die('Access denied.');

call_user_func(static function () {
    $typo3Version = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Information\Typo3Version::class);
    if ($typo3Version->getMajorVersion() === 9) {
        // Else PageTsConfig Listener is used for ModifyLoadedPageTsConfigEvent
        \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\SignalSlot\Dispatcher::class)->connect(
            \TYPO3\CMS\Backend\Utility\BackendUtility::class,
            'getPagesTSconfigPreInclude',
            D3M\Sce\Tca\Registry::class,
            'addPageTS'
        );
    }

    // Register icons
    $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['GLOBAL']['extTablesInclusion-PostProcessing']['tx_sce'] =
        \D3M\Sce\Hooks\TableConfigurationPostProcessing::class;
});