Hydrogen with fuel cells is the most likely green fuel technology for trucks and has advanced well past pilot stage.
Hydrogen is not burned in an internal combustion engine. Instead is combined with oxygen from the air to produce electrity in what can be thought of as reverse electrolysis. Hydrogen is more energy-dense than batteries and would give much better range. However, hydrogen is tricky to handle because it is a gas with a tendency to permeate many materials. There are also energy losses in conversion and compression.
Here is an article from Hyundaion the implementation which started in Switzerland in 2020 and has since been extended to Germany, France, the Netherlands and Austria. Hyundai is the dominant truck manufacturer in this technology and supplies trucks also to the Hydrogen project in the USA. Article here.
There is less dominance by a single country in hydrogen fuel cell technology, compared with electric battery technology.
See this article in Fortune Business Insight
Another consideration: Australia is currently a major energy exporter. Of course, these exports are in the form of fossil fuels. And while we have abundant sun and wind to generate electricity, exporting electricity far from Australia is not a realistic option. However, it is possible to export hydrogen. Australia has exported it's first shipment to Japan in 2022 in a pilot project. See government website. There is also a National Hydrogen Strategy. See also Reuters article on the liquified hydrogen carrier ship which Kawasaki build to support this project. So it would give us credibility to embrace hydrogen fuel cell technology here in Australia.
Embracing hydrogen technology early may be advantageous if we are to remain a major energy exporter in a post fossil fuel world.
Hydrogen fuel cells also exist for cars. In Australia, battery-electric cars are so entrenched that the hydrogen refuelling infrastructure is difficult to justify for cars alone. However, if the infrastructure is rolled out for trucks, then, and I speculate, it seems conceivable that the infrastructure could support cars, also.
Hydrogen fuel cells are also being tried for ships. See this article by fuel cell manufacturer Ballard on the use of their fuel cells in Norwegian ferries.