Set custom option value from cart to product view page in magento 2. i am using on add to cart event checkout_cart_product_add_before and set the option code add_option with option (is_available with yes) but on edit time and update the cart time custom option removed

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you may check this link. https://webkul.com/blog/additional-options-cart-item-magento2/

It can be done by observing the catalog_product_load_after event and setting your custom option using the product->addCustomOptions() method.

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