Unless there have been big advancements, Hydrogen burns clean but is pretty dirty to make, much more than electricity can be. Also, it's the same problem with Hydrogen that electricity has, which is distribution. Where do you go to buy hydrogen on a lonely backroad? Finally, gasses need a lot of volume or pressure to carry significant amounts, so the range may be very limited. I'm sure they can make them safe, but we already had hydrogen vehicles in the 20s and 30s. One was called the Hindenburg, hehe.
That's one reason I think EV is the way to go. The infrastructure will be developed faster for cars, so bikes need to follow those developments IMHO.