If you’re referring to platform boarding, 114/142 stations have this per their site, with 12 more planned. I’m pretty sure that one of the two pictures in the article is of a commuter rail system on the opposite side of the US from the one here and that picture doesn’t show level boarding.
Edit: Of course, if you’re referring to the thick gap between the train and the platform… idk about that.
Edit 2: That second photo was actually part of a different article because apparently this site does that annoying infinite scroll thing where they start another article immediately after the first.