Apple TV activation
How do I activate my free 1yr subscription for buying new iPad Pro
Question marked as
Redeem the offer by tapping the “Enjoy 1 Year Free” button in the TV app on your new iPad.
Read here how to redeem in a bit more detail: Apple TV+ - One Year Offer - Apple
Read here about the conditions: Apple TV+ one year offer - Terms and conditions - Apple
Read here if you have trouble redeeming: If you can't redeem your promotional trial of Apple TV+ - Apple Support