Can't redeem gift for use CloudeCode max

Hi all!

I've recieve gift:

https://preview.redd.it/0grrsjfyv2yg1.png?width=1768&format=png&auto=webp&s=25f5ea12ecd05c3dfee8c00b39f409d2d21249e5

But when I trying to redeem it I recieve message "Gift codes cannot be redeemed with mobile app subscriptions. Please manage your subscription through the App Store or Google Play."

I've checked my iPhone - there is no subscription in AppStore. How can I redeem my gift, help me please.