“We are pleased to announce that Microsoft and @PlayStation have signed a binding agreement to keep Call of Duty on PlayStation following the acquisition of Activision Blizzard. We look forward to a future where players globally have more choice to play their favorite games.”
https://twitter.com/XboxP3/status/1680578783718383616
No word on how long the deal is for, but my guess would be 10 years.
I would argue that MS had every incentive to put Starfield out on PS5, but ultimately decided against it along with all new Zenimax games. They even estimated they would have sold 10 million copies on Playstation. I think that shows they are willing to forego money from some multiplatform games in the short term if they think they will make more money from Game Pass and Xbox hardware in the long run.