Hi!
If you haven't checked it out, Lisa's Study Guides published a good article with topics for the 2021 English oral. Some of these topics include:
Should minority groups (such as LGBTI+ people, disabled people, ethnic groups) be portrayed in the media by people (artists, actors, etc.) who do not have that lived experience?
Should employers do more to provide flexible working from home arrangements for its employees?
Does the Murdoch media empire have too much power in Australian news?
Mandatory consent education should be taught in Australian high schools
And there are many other ones on the site you can explore! It just has to be relevant to contemporary media. I personally did the topic of: "The Australian government should do more to protect sacred Indigenous heritage sites", and I found it really interesting. Good luck!

Just remember to pick something you're interested in.