Here's a Google My Map of the accessible, partially accessible, and inaccessible stations, those in progress, and those planned for the 2020-2024 capital plan: https://drive.google.com/open?id=1MB1F-HQgDhGeNTr9L7KvvG_AEkmYC86H&usp=sharing
I have also blogged about how they count the stations. NYC has the only transit system that counts transfers as multiple stations. This inflates the percent of accessible stations and distorts their estimates for the remaining subway stations. They also make erroneous claims about how many elevators the next 70 stations will need. AB has said "at least 200, maybe closer to 250," but it will realistically be 150 based on their current average of 2.5 elevators per station, even when counting transfer stations only once. https://opencuny.org/jmurray/2019/02/18/even-worse-than-reported-the-nyc-subway-is-only-21-wheelchair-accessible/
I'm involved in the Rise and Resist Elevator Action Group https://www.riseandresist.org/elevator-action-group and always interested in connecting with other advocates interested in making the system more accessible.