The Labor party have been centrists for decades, they’re just leaning into it even harder now.

Australian Socialists (Vic Socialists going national) and Socialist Alliance exist, and probably others I don’t know exist. Hell, even the Greens are somewhat more left wing than Labor (despite having a really stupid internal party structure which is a bit dictatorial).

Left wing voters need to wake up and realise the “Labor” party are a misnomer and have been for a very long time.