How to add order attachments to the success page?

The FireCheckout includes the Checkout Success Page module. You have to enable it first. Please go to Stores - Configuration - Swissup Checkout - Success Page and set Yes in the Enabled field.

To start adding order attachments to the success page, focus on section Page Layout. You have to drag the Order Attachments block from Blocks available on Success Page and then drop it in at Layout of Success Page. Choose the place where you want to show the order attachments section.

Save config or use the Save and Start Preview button to check how the success page looks after adding a new section.