Using checkboxes or multiselect with import fields

Using checkboxes or multiselect with import fields

I am trying to create a lookup formula that aligns with input fields within my form (see example: https://help.zoho.com/portal/en/community/topic/can-forms-do-nested-lookups). It would be like completing this example, but trying to allow for selection of multiple cities and/or states. I can designate the column as 'checkbox' or 'multiselect' after I make it an import field, but am not seeing this when I got to access my application. Any ideas?