Apple Gift Card not received after 24 hours

I recently pre ordered the M2 MacBook Air and was given a $150 Apple gift card as a bonus. It was mentioned that the gift card would be emailed to me within 24 hours, but even after 3 days of waiting, I still have yet to receive it. Is there a specific reason that I may not be receiving the gift card yet, such as it being because it is a pre order? If anyone could let me know, that would be greatly appreciated.