The Toyota Mirai hydrogen fuel cell electric vehicle has hardly been an international sales success, thanks to poor hydrogen infrastructure, expense, and polarizing design, but it proved successful to Ukrainian forces which scavenged parts from the hydrogen car to create the world’s smallest hydrogen bomb.
Mirai isn’t a combustion vehicle, it has a fuel cell that generates electricity via a chemical reaction.
That is true in the case of the mirai, but hydrogen can also be used in combustion engines, though at a much lower efficiency.