Hi there!
I set up a checkout extension APP and I'd like to set zip value using extension API, specifically Addresses API with the function useApplyShippingAddressChange(). Apparently it seems working and if I try to read the shipping address through the checkout steps the zip value is correctly filled but once I placed the order the zip value has not been saved into the shipping Address.
I can't understand what I'm doing wrong.
Can you please help me?
Thank you in advance.
