Site::getSiteIdByTemplate

static function getSiteIdByTemplate(string $tplCode): ?int
{
	$site = BitrixLandingSite::getList([
		'select' => [
			'ID'
		],
		'filter' => [
			'=TPL_CODE' => $tplCode
		],
		'order' => [
			'ID' => 'desc'
		]
	])->fetch();

	return $site['ID'] ?? null;
}