https://techcrunch.com/2019/10/04/amazons-prime-video-app-disappears-from-the-app-store/

In what will hopefully turn out to be just a mistake, the Amazon Prime Video app has disappeared from the Apple App Store, making it unavailable for new downloads or updates to users both on iOS and Apple TV. Twitter users began to tweet to Amazon for help about the problem on Friday morning, to which Amazon’s support channels have yet to reply.

The app’s disappearance was earlier reported by AppleInsider, iMore, and others.