How to access the customer addresses in Shop Pay?

During a Shop Pay checkout, the useCustomer hook returns a customer ID, which is the same as when the customer isn’t using Shop Pay. Using the Admin GraphQL API to query the customer’s addresses on the server, I get the saved addresses for the customer. However, when in Shop Pay, the customer addresses are different than the ones when not logged into Shop Pay, even though they have the same email address.

Can anyone explain this and how I can access the saved addresses while in Shop Pay?