The Cotter is outside my usual range so I am not familiar with Acacia falciformis. I found some small plants and recorded them, then some bigger ones (this record) and then some large ones. I couldn't combine them with the mobile app so they are three sightings that more or less give a time line. The brown 'pods' look like failed inflorescences, with clusters of flower heads.
Falciformis has a broad flat pod and leaves like this. Melanoxylon and implexa have leaves with parallel veins and no indentatiin at the inconspicuous gland, and can have quite curly pods. Almost like two different species.
The leaves look like those of Acacia falciformis, I don't see any pods there is what appears to be part of a dead leaf towards the top left of the failed inflorescence. The form of the inflorescence appears to resemble that of sighting 1944513 from the lower Cotter.