I am inclined to think this is Daviesia genistifolia because the ‘leaves’ (phyllodes) appear to be round in cross-section, there appears to be a joint between the ‘leaf’ and the stem, and the individual flower stalks are very short. Dillwynia sieberi has leaves that are triangular in cross-section, no joint between the leaf and the stem, and the individual flower stalks are about 3 mm long. It is much easier to tell the difference with flowers that are not partly dried out. The standard (upright) petals in the two genera are different shaped.
The joint may be a very small petiole (0.4-1.2 mm). The leaves should be triangular in cross-section and with the angles ('ridges') somewhat rounded if it is Dillwynia sieberi.