You may access the Apple TV app on PS4 TV and Video by downloading it from the store, then following the on-screen instructions. The promotion requires a PlayStation Network account and an Apple ID to redeem.
The Apple TV+ subscription plan will automatically renew at $4.99 per month when the trial period ends unless it is cancelled. Until July 22, 2022, you may take advantage of the PlayStation extended trial package.
The free trial is only available to PlayStation 4 customers; it does not apply to PlayStation 5 owners, who may take advantage of a separate six-month trial.