Maybe Kunzea juniperoides Toelken subsp. juniperoides? A very uncommon sp. https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=in&name=Kunzea~juniperoides~subsp.+juniperoides
I don't think Darwinia has those hairs on the leaves whereas for the K. juniperoides they are specifically mentioned in the species key. (Leaves crowded, linear, 3.5–8 mm long, c. 0.5 mm wide, flat to concave above, apex acute, at first finely hairy, glabrescent with age; petiole to 0.5 mm long.)