how to upgrade from TV 4 to 4K
I want upgrade from Apple TV 4 (HD) to Apple TV 4K (2021). How can I transfer my apps and settings automatically?
Apple TV
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Activate ‘One Home Screen’ on the current Apple TV box, then set up the new Apple TV box, and tell it to use that ‘One Home Screen’ during setup, to sync apps through iCloud.
One Home Screen: Keep apps and the Home Screen up to date across multiple Apple TVs - Apple Support