I confirmed the H. jugulans ID over on INat, this is certainly one of the most southern sightings on both platforms. The Central NSW coast is home to only two species, H. longipes with a distinctly darker pattern and H. jugulans which is known for showing up in places it shouldn't, the species is now known form parts of Victoria, well away from their NE NSW - FNQ range. :)
A moderator on I-Nat has identified this sighting as Heteropoda jugulans. If so, according to ALA it is the southern most sighting of this species (out of over 2000 sightings)....
@KylieWaldon this is a shed moult from a huntsman, it's how they grow and get bigger. Since invertebrates don't have any bones or internal skeletons, they have to moult their exoskeleton in order to grow