The Teleboy app is available for Apple TV from the 4th generation with tvOS 13 and higher in the App Store.
You can find instructions on how to update your Apple TV here: Update Apple TV.
You can find the model number of your Apple TV on the information label on the bottom or in the preferences.
From the Apple TV Home screen, choose Settings -> General -> About.
Our tip: With the Teleboy MAX annual subscription, you can order the Apple TV Box 4/4k in a bundle offer.