Apple TV App Deletion
How do I delete an app from Apple TV?
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What is your model Apple TV? Identify your Apple TV model - Apple Support
On Apple TV (4th generation or later), users can delete apps (except some default apps) as described here: Customize the Apple TV Home Screen - Apple Support
On Apple TV (3rd generation or earlier), users cannot delete ‘apps’, but can hide them. Move and hide apps on your Apple TV - Apple Support