I'm trying to add to the cart the simple products of the programmatically configurable product.

For now I have this script that only puts 1 item in the cart and does not update the minicart:

```
<?php
namespace Catalog\Product\Controller\Index;
use Magento\Framework\App\Action\Action;
use Magento\Framework\App\Action\Context;
use Magento\Framework\Data\Form\FormKey;
use Magento\Checkout\Model\Cart;
use Magento\Catalog\Model\Product;
class Index extends Action
{
	protected $resultPageFactory;
    protected $formKey;   
    protected $cart;
    protected $product;
    public function __construct(
		\Magento\Framework\View\Result\PageFactory $resultPageFactory,
        Context $context,
        FormKey $formKey,
        Cart $cart,
        Product $product) {
            $this->formKey = $formKey;
            $this->cart = $cart;
            $this->product = $product;     
			$this->resultPageFactory = $resultPageFactory;
            parent::__construct($context);
    }
    public function execute()
     { 
		//INSERIMENTO NEL CARRELLO PER PROD CONFIGURABILE	
		if($_POST['productType'] == 'configurable'){	
			$resultRedirect = $this->resultRedirectFactory->create();
			$prodIdColl = $this->product->load($_POST['productID']);
			$simple_collection = array('valore1','valore2','valore3');
			$count = 1;
			
			foreach($simple_collection as $simple_product){
				
				${'prodAddId'.$count} = $_POST['prodCol'.$count.''];
				if( $_POST['qtyCol'.$count.''] > 0 ){
					${'params'.$count} = array(
								'form_key' => $this->formKey->getFormKey(),
								'product' => ${'prodAddId'.$count} , 
								'qty'   => $_POST['qtyCol'.$count.'']
							);              
					${'productCart'.$count} = $this->product->load( ${'prodAddId'.$count} ); 
					$this->_cart->addProduct( ${'productCart'.$count} , ${'params'.$count} );
					
				} 
				
			$count++;
			}
			$this->_cart->save();
			return $resultRedirect->setPath('checkout');
		}
		
		//INSERIMENTO NEL CARRELLO PER PROD SEMPLICE
		if($_POST['productType'] == 'simple'){
			$resultRedirect = $this->resultRedirectFactory->create();
			$productId = $_POST['productID'];
			$params = array(
						'form_key' => $this->formKey->getFormKey(),
						'product' => $productId, 
						'qty'   => $_POST['qtySimple']
					);              
			$product = $this->product->load($productId);       
			$this->_cart->addProduct($product, $params);
			$this->_cart->save();
			return $resultRedirect->setPath('checkout');
		}
     }
}
?>
```

How can I put all the various simple products in the cart?

**Issue with my script:**
The problem is that this script only adds one product to the cart and not all the other simple products. The quantities instead the sums. For example, if I want to add 3 simple products to the cart, I only add the first one and add the quantities of all 3

Thank you