Magento – Disable “Only X left Threshold” Qty from Showing on Store

Did you try in the frontend, whether you can insert a decimal quantity? The information about this is stored in the stock item, if you don't want to track the stock, everything is disabled.

But you are right, it doesn't make sense to disable this functionality - if this happens.

All the disable/show/hide stuff can be found in app/design/adminhtml/default/default/template/catalog/product/tab/inventory.phtml I would assume, you found a bug.

Create a block class to your custom module named Vendor_Module to below path:

app/code/Vendor/Module/Block/Product.php

and add the below content to it:

<?php
namespace Vendor\Module\Block;

class Product extends \Magento\Framework\View\Element\Template
{
    protected $_scopeConfig;
    protected $_stockInterface;
    protected $_productRepository;

    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
        \Magento\CatalogInventory\Api\StockStateInterface $stockInterface,
        \Magento\Catalog\Model\ProductRepository $productRepository
    ){
        $this->_scopeConfig = $scopeConfig;
        $this->_stockInterface = $stockInterface;
        $this->_productRepository = $productRepository;
        parent::__construct($context);
    }

    public function getStockMessage($productId){
        $_product = $this->getProductById($productId);
        $_stock = $this->getStock($_product);
        if($_stock <= $this->getThresoldQty()){
            return __('Only %1 left', $_stock);
        }
        return '';
    }

    public function getProductById($id)
    {
        return $this->_productRepository->getById($id);
    }

    public function getStock($_product)
    {
        return $this->_stockInterface->getStockQty($_product->getId(), $_product->getStore()->getWebsiteId());
    }

    public function getThresoldQty(){
        return $this->_scopeConfig->getValue('cataloginventory/options/stock_threshold_qty', \Magento\Store\Model\ScopeInterface::SCOPE_STORE);
    }
}

Now add the below code to top of your list.phtml

$blockObj = $block->getLayout()->createBlock('Vendor\Module\Block\Product');

Then call the below block inside your foreach loop:

<?php echo $blockObj->getStockMessage($_product->getId()); ?>

You can use the thing in your product details page.