Add same product to quote as a separate item in Magento 2

I want to add the same product to quote but separately. Here is my code

 $quote = $this->quote->create();
 $quote->setStore($store);
 $quote->setCurrency();


$skuArray = array('EC1','EC1);

foreach($skuArray as $sku){

$item = null;
$item = $this->productRepository->get($sku);
$addedItem = $quote->addProduct($item, 1);

if ($customer->getId()) {
        $quote->assignCustomer($customer);
    }

$quote->collectTotals();
$quote->save();    
  }

Every time Magento is adding one item in the quote_item table with two qty in quote table. But I want two items added separately in the quote_item table.

I know if we can add a custom option to each item Magento will treat it as a separate item so i have created observer to add a custom option to cart in ‘sales_quote_product_add_after’ event

class AddAfterProduct implements ObserverInterface
{
public function execute(Observer $observer)
{
    $items = $observer->getItems();

    foreach ($items as $item) {

        $additionalOptions = array(
             array(
               'code' => 'custom_option',
               'label' => 'Custom Option',
               'value' => rand(0,1111)
           )
        );
        $item->addOption(
            array(
                'code' => 'additional_options',
                'value' =>  serialize($additionalOptions),
            )
        );
    }
}
}

This is also not working. Can somebody help me with this problem?

/** @var MagentoQuoteModelQuoteItem $quoteItem */
$quoteItem = $this->itemFactory->create();
$quoteItem->setPrice(123.33);
$quoteItem->setRowTotal($quoteProduct->getPrice());
$quoteItem->setProductType($quoteProduct->getTypeId());
$quoteItem->setOriginalPrice(123.33);
$quoteItem->setCustomPrice(123.33);
$quoteItem->setOriginalCustomPrice(123.33);
$quoteItem->setQtyOrdered(1);
$quoteItem->setQty(1);
$quoteItem->setProduct($quoteProduct);
$quote->addItem($quoteItem);