To check what you’ve redeemed in the past, navigate to the meta store. 

Tap on the My Gifts symbol. 

A window will pop up and show all the gift codes you have purchased and received. 

Codes you’ve purchased for others can be found in the 'Purchased' tab. Here's what you'll see:

• Redeemed: Codes that have already been redeemed.
• Waiting to be redeemed: Codes that have been sent but not yet used.
• Unsold: Codes you haven’t sent to anyone yet, with the option to send them to a friend.

In the ‘Received’ tab, you can:

• View the gifts you’ve received.
• See who gave you each gift.
• Check whether the code has been redeemed.
• If the code hasn’t been redeemed, tap the button to redeem it.