The MyDisneyExperience app is a great resource to find out what's open and what's closed.
Use the upside down teardrop at the bottom of the screen.
Use the left filter to select a park if you wish
Use the centre to filter to 'Attractions', 'Dining', etc.
In the top right select 'Show List'
You will then have a list of every Attraction (or whatever filter you selected) in the park. It's a great way to see what's open and what's closed and also see upcoming changes