Actually Halo Infinite might come out on ps5. Microsoft is publishing a lot of their games to Playstation atm. Sea of Thieves, Hi-fi rush, Grounded, Pentiment are all out on ps5.
Sea of Thieves was one of the big xbox exclusive games, developed by Rare, which is owned by Microsoft since 2002 and all the games they have made in the last 15+ years have been xbox exclusive.