Here in Europe the game is €20 on the Xbox store compared to €50 on the PlayStation store. And there is play anywhere in addition, as a reminder that means that you can play on Xbox, PC, the cloud and you can keep your game anywhere.
Yet another exclusivity less for PlayStation which mainly has exclusive games from third-party publishers and ultimately temporary, it's normal that third-party publishers want to make a profit. It's like for Square Enix, they understood that it's not profitable to develop only for PlayStation. It's a safe bet that Death Stranding 2 will also be released on Xbox given the rapprochement between Kojima and Xbox (can't wait to see the next OD on Xbox).