A program that grants points for using Bing search, which users can redeem for gift cards, sweepstakes entries, or charitable donations.
We are fellow users here in the Microsoft Q&A forum, so we are unable to manually exchange or provide gift cards.
As happened in the past with League of Legends gift cards, which disappeared from the redemption page but returned after a few weeks or months, this may also be temporary. However, Microsoft has not made any official public announcement confirming whether this gift card has been temporarily or permanently removed from your region.
I recommend contacting Microsoft Rewards Support directly to see whether they have any additional information or updates regarding this matter: https://rewards.bing.com/support
Please note that their response time is usually within 24 hours, but it may take longer depending on the volume of tickets they receive (first come, first served). Thank you.