Acacia elata is quite frost tender so I doubt it could go feral in Canberra. It requires a lot of TLC here and then usually karks it before it ever has a flower. Also Acacia elata has only one gland, perhaps two, on the rachis. I agree that the jugary glands suggest a wattle, but not elata. It is not Paraserinthes either. This has four pairs of leaflets or fewer, and only one gland on the rachis.
Michael Mulvaney, the specimen of A. elata you collected from Stirling Ridge in 1985 shows on AVH as being east of the airport. Plantnet says A. elata is "attractive foliage and not likely to be confused with other species".
I did collect it on Stirling Ridge, in the days before GPS so my grid points may have been out. I lodged it with the CSIRO herbarium so that id is good, but not sure about this one.
ABRS Flora of Australia Online describes leaf of A. elata as "Leaves dark green, much paler beneath; pulvinus swollen; petiole 2.5–7.5 (–9) cm long, terete, with 1 prominent dark brown gland 1/4–2/3 below basal pinnae; rachis (3–) 8–17 (–22) cm long, eglandular or sometimes 1 gland at base of uppermost pair of pinnae; pinnae 2–7 pairs, (7–) 10–23 cm long, with a gland often at base of upper 1–5 or more pairs of pinnules; pinnules 8–22 pairs, lanceolate to narrowly lanceolate, often curved, (10–) 20–60 mm long, (3–) 5–13 mm wide (lower ones shorter than others), glabrous or with sparse appressed hairs above, with ±moderately dense white or yellow appressed hairs beneath, with ±central midnerve and 1 or sometimes 2 secondary nerve(s) from base not reaching the margins and sometimes minor lateral nerves, acutely acuminate." I haven't looked at other possibilities but the sticking point of glands seems to be covered.
I am not 100% sure that is what it is. It might be some unknown exotic, or even a wattle I had not considered. It would be interesting to see what the flowers are like.