I took the photos of one specimen; the labellum of the middle flower in photo 1 was triggered and returned into untriggered position in photo 2.
I suggest H. bicolor because of the "M"-shaped black appendage of labellum.
There are several small patches of Hymenochilus within a small area; some have finished flowering; those which had still intact flowers had the same m-shaped labella appendages.
So most likely the specimen of sighting https://canberra.natulabellaremapr.org/sightings/4353350, the photo of which Max took within the same small patch is also H. bicolour.