For loop inside promise chain the reason for useState's set method not working?

New to React and async stuff on javascript, and have looked through a few similar questions on StackOverflow

1. Can I set state inside a useEffect hook
2. Is useState synchronous?
3. React Hook useEffect issue with setState

Here's my useEffect. I'm doing a fetch (in getPieData), using the response to set investment's state (it returns an array), then using investment's new value to set the state of funds (looping through the array). I run console.log and see that the value does exist, but when I run setFundslist and then later map its value in a component, I get undefined is not a function. Setting investment earlier works, so I'm wondering if it's the for loop itself and something to do with asynchronosity that is causing me problems.

  React.useEffect(() => {


    getPieData().then(response => {
      setInvestment(response);
      return response;
    })
    .then((investmentResponse) => {
        const funds = []
        for (var i = 0; i < investmentResponse.length; i++) { 
          funds.push(investmentResponse[i])
        }
        return funds
      })
      .then(funds => {
        setFundsList(funds)
        console.log(funds)
      })
  }, []);

Then in my component, at the asterisked line, I get the following error: TypeError: undefined is not a function (near '...funds.map...')

export default function Table({ fundsList }) {

  const [funds, setFunds] = React.useState([]);

  React.useEffect(() => {

setFunds(fundsList.map(strat => ({***** gainToday: "0.00%", title: strat, gainOverall: "0.00%" })).then(console.log(funds))

  }, []);

return(
              {funds.map(fund => (
               // some stuff
            <tr key={fund.title}>
               // some stuff
          ))}
)

}

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