i believe i am meant to be sent a redemption for AppleTV+
Nothing is send to you, except possibly a reminder if you haven’t redeemed after several weeks.
The offer should be presented in the TV app on your new Apple device. Find “Enjoy 1 Year Free” there.
See here for details: Apple TV+ - One Year Offer - Apple
See here for conditions: Apple TV+ one year offer - Terms and conditions - Apple
If you qualify, and if you did as described in the guide, and you still do not get to see the year offer, then contact Apple Support. They can assist in getting you the service, if needed using activation codes.