Enable ZIP Code Only Collection Without Full Billing Address

I want to be able to collect only the ZIP code at checkout without requiring customers to fill out the entire billing address (street, city, state, country). This would be useful for embedded checkouts where we need ZIP code data for analytics or shipping estimates but don't want to add friction by requiring all billing address fields. It's important because it would streamline the checkout process and reduce form abandonment while still capturing essential location data.