This might be OK. The first couplet in the Plantnet key that the branchlets have long silky hairs. (Unfortunately the branchlets that I can see are out of focus.) If that is so, the second couplet is that most leaves are convex. Though a biggish extension of range south of the Blue Mountains.
Harden is over 20 years old. The Sydney Herbarium keeps more up to date with the scanned version of Harden, the online Plantnet. Or you could try my app Plants of South Eastern New South Wales, available free from Google Playstore and the Apple store.
The AVH map shows tubiflora in Bundanoon, and it looks as if there is a record where I took this photo and another around the Erith coalmine, where I have also seen it.