Hello, thank you for reaching out to Microsoft Q&A.
Usually, gift cards are delivered to your email or appear in your Order History within 24 hours. However, if the order is out of stock, there may be a slight delay in receiving your gift card code.
When you check the Order History page in your Rewards account dashboard, are you no longer able to see the gift card code?
https://rewards.bing.com/redeem/orderhistory
If it is not delivered to you yet, I recommend reaching out to Microsoft rewards support team directly using the link below.
https://rewards.bing.com/support
• Complete the form below for Microsoft Rewards Support and a member of the support team will contact you within 24 hours.