Revtune don't really collate everything though? Just some stuff.
SAU-Vic Calendar usually suits most people that run as part of the championship or otherwise.
There is literally an event on every weekend for circuit, if you wanted to across all the facilities - Sandown / Winton / PI / Calder / Haunted Hills.
Across clubs: WRX, Maserati, PIARC, Alfa, EXE, CircuitClub, MSCA, AROCA
There are other groups you can go with as well, but those are the best run so sticking to them is a good idea.
Then add in drift/drag and you've got a whole bunch of other options