I have one of those dual foot controlled sink valves. Thought it was for a hospital.
Not sure how I will use it, but I might need it some day, ha.
Another instance of a food service sink where you can't touch a shared handle:
If there's no water pressure; I have seen a 5 gallon bucket full of water, with an empty one on top.
A fuel primer bulb is plumbed into the bottom one, with some tubing
and you step on the primer bulb to get water to rise into the bucket on top, which is basically the sink.