@Teaceratops @janet AFAIK it's still running, eg https://www.journeybeyondrail.com.au/guest-information/timetables/the-indian-pacific-2025-2026-timetable/ . Just note it's not a cheap trip!

if in doubt there are bus services that travel between cities too.

They're gonna spend a week on the trip, but it's definitely doable.