Likely for a limited time, it appears Tesla is running a novated lease incentive. The incentive is not currently displaying on the Tesla AU website, however the deal is being promoted by leasing company Smart (https://www.smart.com.au/p/tesla/).
Likely wont update on Tesla AU until tomorrow (when the deal begins). Will update this tomorrow!
I used Toyota's Novated Lease benefit calculator to determine if it was suitable for me, when I got my Mazda back in 2021. Of course, that was a different time with pricing all over the place, thanks to supply-demand mechanics. YMMV, but you can ususally find a sweet spot re the lease tenure to maximize benefits.