Is there an option to select an individual item in the cart to checkout (Not all items in the cart maybe checked out at once).

Out of the box it's not possible. Customer can create an order from the whole shopping cart.

Hi, Do you have plan for it in the future development?

It's not on our roadmap right now. I can add it, but I don't know the exact time frames when it would be added. If you want, you can always hire our developers to provide you such feature. For details you can reach us at support@grandnode.com.