apple tv *

All the ways to watch Apple TV+ - Apple Support

↳ Watch on TV

↳ Streaming devices

↳ Watch on Amazon Fire TV - Apple Support

List of Apple TV app-supported devices - Apple

Then sign in to the Apple TV app, through the in-app Settings, with the Apple ID account that has the subscription.

Assuming you mean Apple TV? You need to set that up on the firestick. https://www.firesticktricks.com/apple-tv-for-firestick.html