A customer's page in Store › Customers has a new Gift cards band. It lists the cards the customer bought, cards sent to their email address, store credit from a refund of their order, and cards used on their orders. Each card shows its balance, its expiry date if it has one, and its most recent changes, and links to its page in Store › Discounts › Gift cards. The band also shows how much the customer can still spend and how much of it is store credit.
Export personal data on a customer now includes their gift cards, with each card's last 4 characters and balance but not its code.