Sony’s PlayStation chief Jim Ryan says the company is wary of sharing dev kits and next-gen console information with Microsoft for their games:

“We simply could not run the risk of a company that was owned by a direct competitor having access to that information.”

Sony made the decision to delay supplying PS5 devkits to Microsoft for Minecraft:

“The development kits allow developers to have visibility and to work on the feature set that our new console will deploy. It would typically mean a developer may bring its content to the new platform later than would otherwise be the case. The commercial risks associated with the knowledge of these feature sets leaking to our principle competitor is not something we’d rely on any contract to enforce.”