I know you're asking a rhetorical question, but the answer to your question is: none (and in some places like Victoria, suicides were down compared to 2019).
https://www.perthnow.com.au/news/health/distress-levels-up-d...
https://www.perthnow.com.au/news/health/distress-levels-up-d...
https://www.reuters.com/world/us/us-drug-overdose-deaths-ris...
A statement about US drug deaths says nothing about what happened in Australia.
Australia shouldn't give up on its strategy of COVID eradication just because American drug overdoses are up.