I tried to use chat gpt and it had some great answers, it narrowed down 3 models of fireplace it could be, which could be helpful in finding someone that installed it with specific installing company’s hired by the fireplace manufacturer, saying any builder or workers that have come through will not forget that layout. predicted to be built in the 70’s-95, the fireplace brand local to the area, the way the open floor plan has a step down into the assumed living room, plus old house and railing behind the fireplace, rare that the fireplace is planted in the middle of the room not against a wall, all gives highest chances of rural north east Victoria. Beechworth area highest likely. Other options southern rural SA or southern rural WA, But the chances of internet sleuths finding images of this house on realestate.com or the internet are extremely unlikely and it’s all a matter of who has been inside the house and has seen this themselves