Ask them if they have an offshore branch.
I know some of Australian and European Brokers suggested their customers switching their accounts to offshore branches, which still have high leverage available.
As to brokers who bet against customers, traders who want to open accounts now
would first decide the brokers are not on the other side of customer's trade.
Such brokers are rare if not extinct now.
Check if your brokers use fixed spread, which means brokers are on the other side of your trade.
Here are all variable spread brokers. I see IC-market is on the list.
https://www.myfxbook.com/en/forex-broker-spreads
They switched me to there offshore account a few months ago, no outside Aussie trades new rule or something, so hoping the margin change won't effect me, but I'm not that lucky.
More hassle setting up another account if so, always something to waste my time