Time for the baseball part of the organization to move on. The org should ensure that he is provided the best medical resources and advice possible, and let what comes after that be whatever it will be. But on the baseball side, in 2024 forward, they need to plan on filling a center field role and have a legitimate plan for DH. Anything short of that is inexcusable from the FO.
If Buxton comes back and can help somewhere, fine. But to plan on it is foolish.