The Australian Foreign Ministry last night called for restraint, adding any changes to the extradition law should reflect "Hong Kong's high degree of autonomy".
"Australia supports the right of people to protest peacefully and to exercise their freedom of speech, and we urge all sides to show restraint and avoid violence," Foreign Affairs Minister Marise Payne said in a statement.
The Australian Hong Kong community has requested the support of Liberal MP Gladys Liu, the first Chinese woman elected to the lower house, who was born in Hong Kong.
She told SBS News: "we would like to see a peaceful way of expressing views from people and see government talking with people in a peaceful way".
Hong Kong leader says extradition bill will not be scrapped
When asked about her personal view on the situation, she said she hasn't been able to make a judgment.
Ms Poon said the community was "a bit disappointed" with the response from Ms Liu.
"We ask for her reply at the end of May, but we received nothing," she said.
"We believe she must share [the] same feeling as us because she is originally from HK, [she] must have relatives and family in Hong Kong."
Those from Hong Kong, who are living in Australia temporarily, fear there may be reprisal from the Chinese government if the bill is passed.
"I'm worried about being in the protest because who knows what the Chinese government will do, there is no rule of law in China," student protester Jacky Ng said.
"Most of the teenagers don't trust the communist party, we don't trust justice in law."
China researcher Graeme Smith from the Australian National University said Australia's response to Hong Kong, compared other countries such as Canada and the United Kingdom, was "very subdued".
"One-third of our trade is with China so if there's anything driving it, and I can't say for sure, it's likely to be economic motivations," he said.
In 2017, the Turnbull government considered an extradition treaty with China, it collapsed after opposition from the Coalition backbench, Labor and crossbenchers.
Mr Smith said at the time there was not much outcry because Australians didn't understand the implications.
Australia's Hong Kong community has already campaigned in solidarity last weekend.
Now they're gathering thousands of signatures in support of their cause, which they hope to hand deliver to the Prime Minister next week.