Executors of a will must wait until probate has been obtained before they can sell the former residence of the deceased (or any other estate property). The following article give s good potted summary of an executor’s duties selling real property forming part of the deceased estate.

https://www.realestate.com.au/advice/how-to-sell-a-deceased-estate/#:~:text=Jemmeson%20says%20a%20property%20can,than%20two%20years%20after%20death.