Using Event : checkout_cart_product_add_after Adding "additional_options" to Quote Item is not validating stock when adding product to the Cart · Issue #23075 · magento/magento2 · GitHub
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On Check out page Giving error in magento2.3. Unable to unserialize. · Issue #26368 · magento/magento2 · GitHub
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Magento: How to get quote item id in checkout_cart_product_add_after observer in magento2? - YouTube
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