Besides Apple’s offer for an extended free trial, there are other offers from partners as well. Please be specific.
Apple’s offer has to be redeemed on the new eligible Apple device. Once you have signed up, then the subscription will also be available on your other devices.
The offer has to be redeemed within 3 months after first setting up your new device. So how recently was “recently”?
Apple’s offer for one free year was reduced to three months per July 1st, 2021. As late October is more than 3 months after that, this one year offer wouldn’t be available anymore to anyone.
Just one offer is available per user or per Family, regardless of number of devices purchased. You can’t get multiple trials.
Read here how to redeem: Apple TV+ offer - Apple
Read here about the conditions: Apple TV+ offer - Terms and conditions - Apple
Read here if you have trouble redeeming: If you can't redeem your promotion for an Apple subscription - Apple Support