I carefully check the label and try to only buy Australian made 100% food.
I never buy any food ever from China.
What's that going to help you with?
Ever been to Innisfail? Have you seen them fly small Cessna's over the banana fields and absolutely drench them with pesticides?
They do this with all the crop fields in Aus.
It's one of the richest food cultures in the world. If you've never tried sichuan peppercorn on mapo tofu, or pickled mustard greens on noodle dishes, I think you're in for a real treat.
These do involve foods from China though..
They have some really good foods. They also have some really unethical foods. When we only have a broad brush...
You can use safe Australian ingredients to cook the recipe.
Does that meaningfully restrict which foods / ingredients you can get?
In terms of fresh meat and vegetables, it's pretty much all grown/produced in Australia. Anything canned / dried is often imported though. Things like rice or coffee beans you technically can buy Australian grown but you'd have to go out of your way to find it.
No. Australia produces vast variety of food everything you could want to eat aside from more exotic stuff.
In Australia, tea and spices are imported predominantly from Asian countries.