Yea, there's an order of M9 railcars that were bought with federal funding for both the Metro-North and LIRR and these will be dubbed the M9A which I think will also have some additional features such as powered bathroom doors, stainless steel urinals and Gorilla Glass windows that don't haze, fade or crystallize.
As for when they're coming, I'm not sure because the current LIRR M9 order is wrapping up soon. Not sure when the M9A's will arrive. At first in 2014, MNR said they would order 188 cars, and then backtracked in Jun 2018 and said they would just overhaul the M3A's and then in Nov 2018, they said they would purchase 170 M9A cars.