My husband would walk away from a turned-on faucet. I went to a local plumbing supply and asked, they ordered and a plumber installed a kitchen faucet, made for houses with children, that turns itself off after two minutes.
It was a major brand. There are ones for bathroom faucets too.
I taped signs around too, but keep an eye out. As he declined, it took me a while to figure out my husband could read the words, but didn’t understand their meaning.