I don't think she has had another release
She wrote a book called "The Glass Hotel", out this year. I haven't read it.
I'm not sure she has written any more science fiction/fantasy books. Which, I guess Station 11 is maybe a fantasy.
I liked it. Mostly. Some of the longer flashbacks pulled me away from the story. I think it would have done better if it was more rooted in the current state of the aftermath, following the symphony around. There seemed to be more to explore there, but it was instead filled with flashbacks.
It was a compelling world that she created. Worth a look anyway. I just found myself skimming a lot of the flashbacks to get back into the story.