Students enrolled at degree-granting universities and colleges can join Apple Music at a discounted monthly rate for up to 48 months. And if you have an Apple Music student subscription, you also get Apple TV+ for a limited time.
The KB says
“Apple TV+ for free for a limited time” The Apple rep told me this time is a year and then your card starts to be charged.
Maybe they were wrong? We haven’t reached the year point yet to see.