How to return document in collection firebase using nodejs

Question

I using firebase my collection and document look like

Collections : Users => Document : UUID (UKLDKHD...) include field :

{
phone_number : 123456
}

In collections users , i have 10 document

Because firebase not support query with undefined , so i write code get all document and filter it :

This is my code

let phoneNumber = await getPhone().where('phone_number', '==', req.phone_number).get();
if (!phoneNumber.empty) {
  await handleLogic(phoneNumber)
}

async function handleLogic(phoneNumber) {
   
  phoneNumber.docs.map(async doc => {
        if (doc.exists && doc.data().deteted_at === undefined) {
          return doc.data
        }
      }
  )
}

But when i call function await handleLogic(phoneNumber) , it return me undefined. I can't understand why ? But when i put log in function

phoneNumber.docs.map(async doc => {
            if (doc.exists && doc.data().deteted_at === undefined) {
               console.log(doc.data())
              return doc.data
            }
          }
      )

it show me correct doc i want get. But when return , it undefined . Please help thanks you