Minecraft for Apple TV has officially been discontinued.
After two years of being available on tvOS, the game is no longer being updated or supported and has also been removed from the Apple TV App Store. Existing users are met with a message mentioning a lack of users and sales upon launching Minecraft.
Effective from Monday, 24 September, the Apple TV version of Minecraft will no longer be updated or supported. We're grateful to the Apple TV community for their support but we need to reallocate resources to the platforms that our players use the most. Don't worry though, you can continue to play Minecraft on Apple TV, keep building in your world and your Marketplace purchases (including Minecoins) will continue to be available.
Minecraft for Apple TV was announced at an Apple keynote in 2016, where the cross-platform potential was promoted heavily. Costing $19.99, the game launched two months later, but it seems the tvOS version of the game didn't take off well.
Microsoft have not made an official announcement on a blog as of yet.
The story-game, Minecraft: Story Mode will continue to be available on Apple TV for the time being, but may also end up getting removed too.