Daimler Benz worked for year to develop a hydrogen powered car. They’ve stopped the research.
https://electrek.co/2020/04/22/daimler-ends-hydrogen-car-development-because-its-too-costly/
See also:
https://www.forbes.com/sites/quora/2017/06/27/why-are-car-manufacturers-ignoring-hydrogen-engines/?sh=3fca39b4027d
Ronn Motor Co. from the great state of Texas has already built a hybrid version known as the Scorpion some years back. Frigette used to sell the hydrogen conversion kits when the Scorpion debuted. Not a bad looking nor performing vehicle.
https://www.motor1.com/news/954/scorpion-the-450-hp-sports-car-by-ronn-motor-company/