you need to check with the maker on how this hydrogen car operate. Toyota, a serious car maker, is doing this and i trust their expertise on this and they even go against Evs.
Follow carefully their narrative. Initially they were bullish on hydrogen as the fuel. But now they realised all the downsides of hydrogen, explosive, difficult production, transport, logistics, storage. Then when in use in cars, no pressure containers can hold that hydrogen safe unless it was housed in a bomb shelter? How do you move that kind of stuff. Mind bogglingly super dangerous in production and use, not forgetting it will generate more greenhouse emission in it's production than fossils.
Here is when the narrative shifts. Now it's NH³. And they want to claim it's safer.
No worries. They will change the narrative again, all led by the Japs who want to retain their ICE production lines and jobs.