how to activate apple tv free 1 year on iphone 11 pro max

Make sure you follow the steps below. If it still doesn't work then contact Apple support

1. Turn on your new Apple device and sign in with your Apple ID.
2. Open the Apple TV app. Make sure your device is running the latest version of iOS, iPadOS, tvOS or macOS.
3. The offer should be presented immediately after launching the app. If not, go to the Apple TV+ channel page where you’ll see the offer.
4. Tap Enjoy 1 Year Free.

That is not a proper statement, i'm not sure what you mean by that.