Due to reduced restaurant capacity and physical distancing, Disney made the difficult decision to cancel all existing dining reservations and experience bookings, including Disney dining plans included in packages through at least the end of 2020. They will also change the 180 day window for making reservations to a 60 day window for the time being.
EDIT: Disney appears to be going in and editing the dates on their announcement. Travel agents have been sent "all dining cancelled until September 2021", on their website it said "until the end of the year" and now it just says "all dining plan cancelled". It's unclear what the end date of this policy is at the moment.
All Fastpass+ plans have (or will be) automatically cancelled to make additional queue space for physical distancing.
Extra Magic Hours
Extra Magic Hours for resort guests has been suspended and won't be available until further notice.