The object that the user should navigate to to review credit card payment data for a specific Order is Order Payment Summary. An Order Payment Summary is a record that represents a payment made for an order or part of an order. An Order Payment Summary has a lookup relationship to both Order Summary and Invoice objects, and it contains information such as the payment amount, method, status, etc. Verified Reference: https://help.salesforce.com/s/articleView?id=sf.order_management_order_payment_summary.htm&type=5

Three components that can be used to modify the user experience in the Order Summary detail page are:
Tabs. Tabs are a type of component that allow users to switch between different views or subpages on a record page. Tabs can contain other components, such as charts, reports, or custom components, that display different information or functionality related to a record. The administrator can use the Lightning App Builder to add and customize tabs on the Order Summary detail page to give users more options and flexibility.
Accordion. Accordion is a type of component that allow users to expand and collapse sections of a record page. Accordion can contain other components, such as fields, related lists, or custom components, that display different information or functionality related to a record. The administrator can use the Lightning App Builder to add and customize accordion on the Order Summary detail page to give users more control and visibility.
Related List-Single. Related List-Single is a type of component that displays a single related list for a record. A related list is a list of records that are linked to another record by a relationship field, such as lookup or master-detail. The administrator can use the Lightning App Builder to add and customize related list-single on the Order Summary detail page to give users more access and context.
Verified Reference: https://help.salesforce.com/s/articleView?id=sf.lightning_app_builder_components.htm&type=5

The recommended approach for deploying certain pages in Order Management to approved mobile devices is to install the Salesforce mobile app from Apple Store or Google Play and save the pages with the options of both Desktop and Phone applied. The Salesforce mobile app is designed for easy data access on the go. You can view Order Management record pages on the mobile app, but you can't access its console features, like screen flows. To make a page available on the mobile app, you need to save it with the options of both Desktop and Phone applied in the Lightning App Builder. Reference: Salesforce Order Management, Mobile App Theme FAQ

Use Data Loader. Data Loader is a client application that allows administrators to bulk import or export data from Salesforce using CSV files. The administrator can use Data Loader to import data into Order Management objects, such as Order Summary, Order Item Summary, Fulfillment Order, etc., or export data from these objects for backup or analysis purposes.
Verified Reference: https://appexchange.salesforce.com/ https://help.salesforce.com/s/articleView?id=sf.data_loader.htm&type=5

One invoice will be created when using the Create Invoice Apex action in a flow. The Create Invoice Apex action is a custom action that creates an invoice for an order summary. An invoice is a document that requests payment from a customer for an order. An invoice can include one or more fulfillment orders and one or more credit memos. A fulfillment order is a record that represents a part of an order that is fulfilled by a specific location. A credit memo is a record that represents a partial or full refund for an order or a fulfillment order. An order summary can have multiple fulfillment orders and credit memos associated with it, but only one invoice will be created for the entire order summary. Reference: Order Management Objects, [Create Invoice Apex Action]