Wix-Store need new field

Hello everyone,
I’m not sure I’m in the right place to ask my question?
I am using the wix-stores application but I have a problem with the “Products” table because I need a “date of publication” field because I am selling books. Is it possible that a member of the “VELO” team can add this field to my database? Because I do not have access to the definition of the fields of this table.
Sorry if I am not in the right place for this request.
thanks in advance