TypoScriptHelper::getTypoScriptObject() 

public function getTypoScriptObject(?int $pageUid = null): FrontendTypoScript
{
	if (!$pageUid) {
		$pageUid = \nn\t3::Page()->getPid();
	}
	// make sure, we don't get config from disabled TS templates in BE context
	$context = GeneralUtility::makeInstance(Context::class);
	$visibilityAspect = GeneralUtility::makeInstance(VisibilityAspect::class);
	$context->setAspect('visibility', $visibilityAspect);
	$site = GeneralUtility::makeInstance(SiteFinder::class)->getSiteByPageId($pageUid);
	if (!$site) {
		throw new \Exception('Site not found for page ID ' . $pageUid);
	}
	$pageInformation = $this->getPageInformation($site, $pageUid);
	$isCachingAllowed = false;
	$conditionMatcherVariables = $this->prepareConditionMatcherVariables($site, $pageInformation);
	$frontendTypoScript = $this->frontendTypoScriptFactory->createSettingsAndSetupConditions(
		$site,
		$pageInformation->getSysTemplateRows(),
		$conditionMatcherVariables,
		$isCachingAllowed ? $this->typoScriptCache : null,
	);
	$ts = $this->frontendTypoScriptFactory->createSetupConfigOrFullSetup(
		true,  // $needsFullSetup -> USER_INT
		$frontendTypoScript,
		$site,
		$pageInformation->getSysTemplateRows(),
		$conditionMatcherVariables,
		'0',  // $type -> typeNum (default: 0; GET/POST param: type)
		$isCachingAllowed ? $this->typoScriptCache : null,
		null,  // $request
	);
	return $ts;
}