That is saying the same thing twice, not one explaining the other.
The suffix .com.au doesn’t mean it is an Oz company or based here. The suffix .com doesn’t mean it is from anywhere in particular, and it may belong to a local company.
Have a look at the thread on machinery sales scams to find out more about the lengths bad actors will go to to hide their tracks, for them registering a .com.au web page is automatic.
Yes you have more rights and more chance of having them enforced for a company subject to Oz consumer law but the suffix doesn’t tell you that.
Even if the suffix was indicative of origin not all locals are good and not all furriners are evil.
