Perhaps it's not meeting Minimum connection time (65mins connection with your timing) which is why it's not showing?
It definitely meets MCT as it used to be offered 'directly' as SFO-HND-SYD (found by searching SFO-SYD). I have seen another one from somewhere in USA (sorry forgot where)-HND-SYD with only 55 mins connecting time (although PE only)
Sadly can't use FJ for OWAI should note that not all airlines do this. For your SFO-SYD flight for example, FJ through NAN might be an option, and they don't restrict flights in this fashion IME.