The page now refers to the forthcoming park reservation system, and advises passholders that they can check back once the system launches to see if the park they'd like to visit has availability for a certain date.
Currently, the annual passholder calendar shows dates through the end of June 2021. All dates are marked "reservations required." The My Disney Experience app has not yet been updated.
To stay on top of all of the Walt Disney World reopening details, be sure to check out our dedicated Walt Disney World Resort Reopening Information and Updates page.
Source: Walt Disney World