There is customer information embedded in order information. Although your app can’t directly access the customer information via the Customers API, it will still have access to customer information that is part of an order, such as name, billing/shipping address, email address and phone number.
Sorry for my delayed response! There is Order information visible via shipping and fulfillments data which is accessible with the read_shipping scope. A fulfillment object contain information such as order number, line items, and price - as well as customer address information. You can see an example of this object here: https://shopify.dev/api/admin-rest/2021-10/resources/fulfillmentorder#resource_object