Using typeof() to get object value type – receiving string instead of array

I have an object where two parameters hold arrays as their values. When I try to output the types of these values using the typeof() function in a loop, for some reason, I always get a string type instead of the actual array value.

const add = "add"
const edit = "edit"
const required = {
  user: [add, edit],
  profile: [edit],
}

for (let p in required) {
  console.log(p, typeof(p))
}

Output:

string
string