Can I ask why? Microsoft has a monetary incentive to push the games to other platforms wherever possible. Yeah they may hold a few back (see Starfield) to try and sell consoles but I don't expect them to withhold all. There were some interesting articles that this deal is more about the mobile gaming (King) rather than COD or other AB games.
As an Xbox and Nintendo owner I feel Sony/Nintendo have done more harm to the industry by reinforcing exclusives (both times and complete) than Microsoft. Wouldn't it be in Microsoft's right to do what the market leaders are doing and take advantage of exclusives to try and gain market share back? We also saw with testimony/discovery during the trial that Sony would often say one thing publicly and another internally. I think Sony only opposed this cause they wanted to stoke the fire of fandoms.
Okay there... And before thay Sony was trying to lock Starfield away on their side so what's your point? The current market is driven by exclusives thanks very much to Sony and Nintendo.