anything on any of them, it would seem odd that all of the injectors are bad. If you have voltage and you’ve determined that the ECU is triggering them, I’m not sure what’s left other than it being a grounding issue.
At least it looks like you’ve gotten to the component that’s not working - that’s a milestone. You’ll just have to work through all possible failure modes (causes). Again, highly unlikely that all the injectors are bad. Not to say it’s impossible, but it’s more indicative of a systematic problem as opposed to a component problem.