There are numerous sources for short data.ASX publishes short data daily here https://www.asx.com.au/data/shortsell.txt. The above website 61 financial allows you to do some research but requires you to register. Their short data is currently only up to date to 20/6/22. The more commonly used website is https://www.shortman.com.au/ which currently has data up to 24/6/22. Hope this helps.
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