There's a good chance all or almost all of the events at the Oceania qualifier will be reallocated, especially with New Zealand not contributing. At the Pacific Games, they barely had enough competitors and that's without the athlete limitation.
Even at a best case scenario, the following nations competed at the Pacific Games:
On paper all of the events could be eligible if the nations work together. In reality, the Pacific nations will probably want to avoid Australia as much as possible so we could have a situation where Australia's chosen events are not eligible while the other events are full of Pacific nations. That's probably the opposite of what World Taekwondo wanted. As mentioned before, it's not difficult to figure out 3/4 events Australia will choose (unless they decide to play mind games and participate in weaker events so that they can qualify).