Possibly. The altitude is high enough. It would be a first sighting in NSW outside the Snowy Mtns ans western edge of the ACT. Unfortunately, the keys in both Plantnet and Vicflora separate nanus from strictus on the fact that in nanus the leaves are opposite and in strictus they are alternate. Not much help when the leaves are long gone. The line drawings in Vicflora show the branches in nanus coming off the stems in pairs and is strictus one at a time. The fruit colour is no help. It can be red is both species.
I asked Jackie Miles, who has a lot of experience with alline flora, about it. Her reply was that she could not recall ever seeing Exocapos nanus, but from photos she has seen of it she would have thought it might be a bit less branched than that. She was thinking it might just be a stunted Exocarpos strictus. My feeling is that if it is actually likely to be Exocarpos nanus, it is an extremely important sighting that needs someone from NSW National Parks to go and get a specimen for Sydney herbarium.
Keith McDougall of the NSW Office of Environment and Heritage said "Definitely not E. nanus, which has opposite leaflets (check out the photos on the Flora of Victoria site) – it is also a prostrate thing. Almost certainly E. strictus."