newsupernova/app/code/WeltPixel/Quickview/Plugin/BlockProductView.php

<?php

namespace WeltPixel\Quickview\Plugin;

class BlockProductView
{
    
    const XML_PATH_QUICKVIEW_REMOVE_QTY = 'weltpixel_quickview/general/remove_qty_selector';
    
    /**
    * @var \Magento\Framework\App\Config\ScopeConfigInterface
    */
    protected $scopeConfig;
    
    /**
     *
     * @var  \Magento\Framework\App\Request\Http 
     */
    protected $request;
    
    /**
     * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
     * @param \Magento\Framework\App\Request\Http $request
     */
    public function __construct(
            \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
            \Magento\Framework\App\Request\Http $request)
    {
        $this->scopeConfig = $scopeConfig;
        $this->request = $request;
    }

   /**
    * 
    * @param \Magento\Catalog\Block\Product\View $subject
    * @param bool $result
    * @return bool
    */
    public function afterShouldRenderQuantity(
        \Magento\Catalog\Block\Product\View $subject, $result)
    {
        if ($this->request->getFullActionName() == 'weltpixel_quickview_catalog_product_view') {
            $removeQtySelector = $this->scopeConfig->getValue(self::XML_PATH_QUICKVIEW_REMOVE_QTY,  \Magento\Store\Model\ScopeInterface::SCOPE_STORE);        
            return !$removeQtySelector;
        }
        
        return $result;
    }

}