Hydrogen has a lot of issues. It is hard to store. As gaseous it has terrible energy density. As liquid it needs to be stored at extreme cold, 20 Kelvin (-250C or -420F). Compare to balmy 110K for methane. It leaks out of tiny holes. Electrolyzers and fuel cells (currently) need expensive platinum group metals. Round trip efficiency is bad.

There absolutely should be research and prototypes, there I agree. But companies are already looking for massive amounts of government money for large projects.