Additiona Option Fields

I am really excited about the potential of Mautic and at the same time I am little bit surprised that I cannot find a basic feature. May be my inexeperience with Mautic.
I refer to Customer Filed. My simple question is let’s say I have a list of Data Option records to put in a Customer “Select Multiple” Data Option. How can I import them in bulk?
For example let say I want to pre-fill customer fields be able to select the zip code of a certain city, how can do that?
Thanks in advance
Mauro

Maybe you can use mauti api to create a field.