Magento 2: code to get featured products

<?php
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
/** @var \Magento\Catalog\Model\ResourceModel\Product\Collection $productCollection */
$productCollection = $objectManager->create('Magento\Catalog\Model\ResourceModel\Product\Collection');
/** Apply filters here */
$collection = $productCollection->addAttributeToSelect('*')->load();
  
 foreach ($collection as $product){
    // echo 'Name  =  '.$product->getName().'<br>';
    echo '<pre>';
    //print_r($product->getData());
    print_r($product['sw_featured']);
    echo '</pre>';
}
?>