Based on the trail closure/detour described at https://www.nynjtc.org/trail-alerts/AT-PIPDetour and the announcement at https://appalachiantrail.org/trail-updates/new-york-major-detour-harriman-state-park/ that this temporary reroute will be the official route of the AT in 2023, https://www.openstreetmap.org/way/1123702067 has been tagged disused and removed from the New York AT route relation. 

https://www.openstreetmap.org/way/1005062290 https://www.openstreetmap.org/way/316897990 and https://www.openstreetmap.org/way/1005062291 have also been removed from the AT relation, and had their AT tagging removed. Possibly these segments will be renamed?

The Ramapo-Dunderberg Trail ( https://www.openstreetmap.org/relation/5485397 ) also no longer crosses here. It has not (best I know) been rerouted, but instead now has east and west portions that don't connect.