Do bald people use hair shampoo to wash their head or body shampoo or soap?

my dad is bald cause of taking chemo and he uses shampoo, it keeps his head smooth and it doesn't dry out.Do bald people use hair shampoo to wash their head or body shampoo or soap?
My dad's mate uses body wash. Or facewash. Or soap. Whatever's closest. But no, not shampoo.Do bald people use hair shampoo to wash their head or body shampoo or soap?
its still a scalp so id think it would need moisturizing and cleaning. therefore bald people probables use shampoo still.
It would be logical to use regular soap.
I think it depends on the specific person.