The XM-1 (GM) is now available for all, but the XM-1 (Chrysler) is still Xbox exclusive?

A while ago the XM-1 (GM) was removed from the store and recently added back as a GE premium. However, it was added to all platforms the game is currently available on, including Xbox where the Chrysler still resides as an exclusive. This strikes me as odd given that the separation of the GM and Chrysler variants were done deliberately. Wouldn’t it be appropriate to similarly add the Chrysler variant to PC, perhaps as a store pack to replace the hole the GM left?

Microsoft is in control of that contract.

Doesn’t they have contract with Phil?