Please Use below code

    <?php
    namespace VendorModuleBlock;

    class order extends MagentoFrameworkViewElementTemplate
    {
    protected $OrderFactory;

        public function __construct(
            ...
            MagentoSalesModelOrderFactory $OrderFactory
            ...
        ) {
            ...
            $this->OrderFactory = $OrderFactory;
            ...
        }

        public function orderCollection()
        {
            $orderCollection = $this->OrderFactory->create()->getCollection();
            $orderCollection->getSelect()->limit(5);
            foreach ($orderCollection as $key => $orderID) {
                $order = $this->OrderFactory->create()->load($orderID->getId());
                $orderItems = $order->getAllItems();
                foreach ($orderItems as $item) {
                    $product_name = $item->getName();
                    $product_id = $item->getProductId();
                    echo $productName . "||" . $product_id;
                }
            }
        }
    }
->'orderCollection' Method call in your phtml.
-> like $this->orderCollection();