Hey guys, thanks for pointing this out and making a new topic.
There is definitely an issue on our end here, and we will be addressing it as soon as we can.
But I would say to make sure that your device is within our supported platforms! If it is too old, the game will not be available on the App Store. You can check here what our supported platforms are. And here for the minimum requirements.
Thanks guys, I'll keep you posted here!