EV road user charge is probably a bit premature.
https://www.carexpert.com.au/car-news/australia-delays-ev-road-user-charge-slammed-as-thinly-veiled-tax
Approximately 350k EVs registered in Australia, out of 16 million.
2.1% is pretty low. Not a really significant number. They should probably wait until 10-15% of the market, otherwise it's another reason not to consider it.
Unless the policy makers can make a reasonable decision that takes into account vehicle weight and the number of KMs travelled it is probably going to be a simplistic charge that will be more of a virtue signal to the fossil fuel users.