On Apple TV (3rd. Generation - Model A1625) it should by possible to hide apps. But when I click on an app (Icons starts wo wiggle) I have only the option to move it to a folder. There is no option to hide them. I have tried tvOS13 and tvOS14.
Source: https://support.apple.com/en-gb/HT200126
Delete or hide apps
On Apple TV 4K and Apple TV HD, you can delete apps. On Apple TV (2nd or 3rd generation), you can hide them. Just highlight the app and hold down the Touch surface or Select until the app starts to jiggle. Then press the Play/Pause button and choose Delete or Hide.
Source: https://support.apple.com/en-gb/HT200126
Delete or hide apps
On Apple TV 4K and Apple TV HD, you can delete apps. On Apple TV (2nd or 3rd generation), you can hide them. Just highlight the app and hold down the Touch surface or Select until the app starts to jiggle. Then press the Play/Pause button and choose Delete or Hide.
Last edited: