We do? Where? Using what fabrication technologies.

I’ve worked mostly in or adjacent to manufacturing and primary industry.

As far as I’m aware, the majority of hydrogen production is use on site, and mostly for ammonia production.

There isn’t really much in the way of hydrogen storage and transportation, it’s mostly used where it’s generated.

And if we use expensive as a proxy for heavy / energy intensive, which it is in the case of hydrogen, that goes a long way to preclude it from anything like being useful for transportation.