Hydrogen trucks are mostly a solution looking for a problem.
Most countries have duty hour limits for safety reasons, as having a trucker drive for 20 hours at a time is a really bad idea. Similarly, they usually have a mandatory mid-duty break.
Combined with the speed limit for heavy-duty vehicles, this provides a clear upper bound on the range any truck needs to have, and today's electric trucks are really close to it - or even exceed this already.
This reduces hydrogen trucks to multi-driver trips (incredibly rare due to the significant additional cost) and multi-day trips without rest stops (Australia?).
Considering that the market is going to be tiny: who's going to buy expensive hard-to-maintain trucks, and how are they going to refuel them? Wouldn't it make more sense to just build diesel-electric trucks and fuel that handful with carbon sequestered diesel?