Most of the trains operated by Translink in/around Brisbane / South-East Queensland seem to travel fairly short distances. The ones I've taken within the Brisbane area don't have toilets on them, presumably because of the short travel times.
However, not all Translink trains are like that. Those serving the Sunshine coast have longer journeys, with a journey like Nambour to Brisbane taking around 2 hours, and Gympie North to Brisbane around 3.
I've tried looking on the Translink page for "Hour to use the train", but it doesn't mention anything about toilets.
Do these long distance (2-3 hour journey) Translink trains have toilets on board?