Firstly my comment above re- "the cut off grade on 15% of the known resource" I believe is incorrect. The increase is to the global resource so please ignore that comment.
Also of note is that the BFS (same table referenced above) has a total interest accrued of $9m AUD.
From the BFS

From the Sydney mining club presentation (7th July 22)

There is a big difference between the BFS assumed funding and what the end result of funding was/is, not to mention that the 6m grant does not need to be paid back. Between the 6m and the drastic cut to interest payments that alone should give the NPV a little boost and the IRR a substantial boost.
Currently the BFS has an estimated cash cost of $155 AUD/mtu. This is the number to watch when the new updated BFS comes out.
I am looking forward to the BFS and updating my comparison with the Dolphin project.