I am trying to add additional information on grouped products, but I am not getting results. I use following code which is working properly for other products but not working on grouped products.


    <?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalog_product_load_after">
        <observer name="set_additional_options" instance="Vendor\Module\Observer\SetAdditionalOptions"/>

Observer (SetAdditionalOptions.php) file


namespace Vendor\Module\Observer;

use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\App\RequestInterface;

class SetAdditionalOptions implements ObserverInterface
     * @var RequestInterface
    protected $_request;

     * @param RequestInterface $request
    public function __construct(
        RequestInterface $request
    ) {
        $this->_request = $request;

     * @param \Magento\Framework\Event\Observer $observer
    public function execute(\Magento\Framework\Event\Observer $observer)
        // Check and set information according to your need
        if ($this->_request->getFullActionName() == 'checkout_cart_add') { //checking when product is adding to cart
            $product = $observer->getProduct();
            $additionalOptions = [];
            $additionalOptions[] = array(
                'label' => "Some Label",
                'value' => "Your Information",
            $observer->getProduct()->addCustomOption('additional_options', serialize($additionalOptions));

Please help. Thank You in Advanced

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