Just like the vehicles, hydrogen fuel stations require a LOT of continuous and costly high precision maintenance. Without that they become unsafe to operate. With no real market to serve they quickly become an expensive white elephant.

Hydrogen is hell on metal components and these super high pressure systems need to be re-certified every 24 months. The expense of certifications is quickly becoming uneconomical

https://www.hydrogeninsight.com/transport/hydrogen-vehicles-in-denmark-left-without-fuel-as-all-commercial-refuelling-stations-shuttered/2-1-1519914