This is Australia as known circa 1800 – there is the colony at Port Jackson/Sydney and up the Hawkesbury River to Coal River/Newcastle.
Van Diemen’s Land also had British settlers in 1803. Unfortunately, a Ruby time travel destructive side effect put paid to that. The coastline mapped, but the continent is just a big hexcrawl at this time.
https://nla.gov.au/nla.obj-703257590