It’s an electric fuel pump so if you don’t hear the clicking, you may not be getting the fuel pump pumping fuel to the injector pump. I’ve read it possible to get some fuel to the injector pump if the tank is full.
No clue what’s going on for you, but if I were you, I would check to make sure the fuel pump is getting power and actually pumping. My guess would be that without the clicking sign it’s probably not pumping and might not be getting power. Could be something as simple as a blown fuse. I’m not sure I’d have to look at the electrical diagram to make a better guess.