Rather than fragmented groups, get your Australiana posting in at the Aussie Zone Communities. No affiliation other than living in Australia.
Has cities, sports, politics so far and will add more as needed. It even has Perth and thankfully no Tasmania.
https://lemmy.nine-hells.net/c/admin
There is a Tassie one on a different instance but not much on there
There’s definitely Hobart on aussie.zone.
I believe in an Australian map without Tasmania.
Yeah Hobart is there, I’m the only one who has posted haha. We have moved to NZ anyway, the mainland smells
Another place that is sometimes missing from maps. You must have a kink.