Hi Sushanth,
While adding the product to the cart, Retrieve the list items (products) added to the cart, and then do a find object from the List operation function to check if the item is already added or not. Use primary such as Item Id to check. If the find object Activity return a value, update the quantity in the cart. Keep an Exclusive split to determine whether to update or create a new object.
If you can share a screenshot of the microflow, we could guide you more.
Hope this helps!!
Hi Sushanth,
You will need a Microflow on your "Add" Button.
In this Microflow literate over all Items in your Cart and check if the name of the current Item is in your Cart.
If so, retrieve the Item with the same name and change the quantity of this Item.
https://docs.mendix.com/refguide/loop/ - for loop
Hope this Helps,
I have attached screenshot of the microflow