I’m willing to bet that Marriott’s “work anywhere” program was created as a part of a “get revenue any way you can” strategy during the pandemic, when hotels were empty. Over time, it became less important as a revenue generator, so hotels stopped participating in the program. But, as @BuffaloKyle mentioned, the product is still listed in their Property Management System, which I’m guessing is ancient since they’re still using “Green Screen” rather than a GUI interface. I doubt that any more than a few hotels are still in the program. Too bad, since those of us that are Bonvoy members would have loved this option!