Apple are offering 6 months free Apple TV+ for both new and existing subscribers who opt in on PS5. Strangely the deal is different for PS4, only seems to work for new subscribers.
In order to grab the deal I downloaded the Apple TV+ app on my PS5 and when I started it up it gave the option for a 6 month trial and changed my current subscription end date out to Jan 2024.
Mod: Original deal. (Duplicate exceptions: “The original deal is active but older than 6 months.”)
It's only 3 months for PS4 - I signed up on the 9th (never had Apple TV+ before) and got it.