Clarification wanted - what list does iNat use for threatened status in observation searches?

I’m based in Australia and the project i hosted is currently listing that it’s sighted more than 95 threatened species - but only 24 are actually listed under our EPBC act here and many are not even listed on the IUCN red list??
I’ve cross-checked the listings and there are significant errors in the algorithm that is filtering the observations from what I can tell- species like domestic dogs sightings are getting pulled through and others that are not listed on IUCN. Would be good to know what listings you use for your algorithm so i can try and make sense of the data.

Link to the observations with filters applied here: https://www.inaturalist.org/observations?captive=false&place_id=any&project_id=join-the-naturenearyou-challenge&threatened&view=species