There are some scope pics here: AC - AC Adapter and Arduino for Measuring AC Voltage - #46 by dBC that show why the electronic type aren’t suitable.
I’ve not tried one of these these so don’t take it as a recommendation, but something like this: https://www.jaycar.com.au/9v-ac-1-amp-plugpack/p/MP3027 might do the job if you don’t want to go the travel adaptor route.
I’ve been meaning to pick one up and stick it on the scope and see how faithfully it reproduces the AC signal, and how constant its phase shift is across the varying input voltage. Those are the main two criteria to look out for, and the hardest to judge just from the specs. Where in Aus are you? Here in SEQ my mains varies from about 245V to 260V so you’re looking for something that has a fairly constant phase shift across the range it’s exposed to. (I can’t recommend a local solution because I don’t use a VT in my setup).