The face mask policies have changed several times in Disney World over the past couple of years, and now, they have changed once again.
When Disney World first reopened in July of 2020, face masks were required almost everywhere. That later changed to face masks becoming optional outside, and then again becoming optional almost everywhere for vaccinated guests. The only place that has kept mask requirements in place for everyone (ages 2 and older) was on enclosed transportation like the Monorail. But, that has now changed.