Couple of different data sources
https://dvcharts.xarthisius.xyz/ceacFY21.html if you scroll down to the embassy section you can see case number ranges that are at the embassy.
Xarthisus updates his data twice a month
*These statistics are taken from the CEAC Official Website.
savediversityvisa.org
Save diversity visa update data daily, if you scroll down to Sydney (SYD and OC) you can see the Max case currently at the embassy is in the 1500 range. Sydney has also processed cases for other regions (low numbers and i believe it was prior to everyone cases becoming current)
Hope this helps