Hi,
No, PayPal cannot add the shipping costs (unless you configure shipping methods in your PayPal merchant account:
www.paypal.com/us/webapps/mpp/calculate-ship-and-tax
).
So if you want the shipping costs that you added in HikaShop to be in the order, you need to add the shipping view in your checkout workflow (and maybe more based on how you configure your shipping costs... for example, with UPS, Fedex, USPS, etc, they need the address of the user, so you also need login and address in your workflow).