Acacias can be extraordinarily difficult to ID from photos. There are a lot of species that this is not, and some it might be, but without knowing eg how many individual flowers are in the heads, and without good photos of the front and back of a leaf showing the veins, hairiness if present, and the gland(s) if present, it is not possible for me to say what it is.
Thanks Betty and Jackie for educating me on what is required to make identification easier. I will endeavour to capture more detail as advised next time.