data map function does not rendering data in as Text React Native

import React, { useEffect, useState } from "react";
import {
  Button,
  StyleSheet,
  TextInput,
  View,
  TouchableOpacity,
  Text,
} from "react-native";
import axios from "axios";
export default function Home() {
  const [data, setData] = useState([]);
  const [indexNo, setIndexNo] = useState("");

  const getUserData = () => {
    axios
      .get(`https://jsonplaceholder.typicode.com/todos/${indexNo}`)
      .then((res) => {
        const fData = res.data.data;
        console.log(fData);
      });
  };
  return (
    <>
      <View style={styles.mainView}>
        <View style={styles.searchView}>
          <TextInput
            style={styles.searchBar}
            keyboardType="numeric"
            placeholder="Index Number  e.g.25"
            placeholderTextColor="#4F4F4F"
            blurOnSubmit="true"
            value={indexNo}
            onChangeText={(e) => {
              setIndexNo(e);
            }}
          />
          <TouchableOpacity style={styles.button} onPress={getUserData}>
            <Text style={styles.buttonText}>Search</Text>
          </TouchableOpacity>
        </View>
        <View style={styles.subView}>
          <Text style={styles.title}>Your Details</Text>

          <View style={{ padding: 40 }}>
            {data?.map((item) => {
              return (
                <Text style={styles.flatListText}>
                  {" "}
                  {item.birthYear} {data?.contactNumber}
                </Text>
              );
            })}
          </View>

          <View style={styles.cardButtonRow1}>
            <TouchableOpacity style={styles.buttonGroup}>
              <Text style={styles.btGroupText}>Sem 01</Text>
            </TouchableOpacity>
            <TouchableOpacity style={styles.buttonGroup}>
              <Text style={styles.btGroupText}>Sem 02</Text>
            </TouchableOpacity>
          </View>
          <View style={styles.cardButtonRow2}>
            <TouchableOpacity style={styles.buttonGroup}>
              <Text style={styles.btGroupText}>Sem 03</Text>
            </TouchableOpacity>
            <TouchableOpacity style={styles.buttonGroup}>
              <Text style={styles.btGroupText}>Sem 04</Text>
            </TouchableOpacity>
          </View>
        </View>
      </View>
    </>
  );
}
const styles = StyleSheet.create({
  mainView: {
    backgroundColor: "#393939",
    flex: 1,
  },
  searchView: {
    marginTop: 50,
    flexDirection: "row",
    flexWrap: "wrap",
  },
  searchBar: {
    marginLeft: 40,
    backgroundColor: "#D9D9D9",
    color: "#4F4F4F",
    width: "50%",
    height: 40,
    textAlign: "center",
    borderRadius: 50,
  },
  button: {
    marginLeft: 17,
    marginRight: 40,
    backgroundColor: "#2369F0",
    width: "24%",
    height: 40,
    borderRadius: 50,
  },
  buttonText: {
    color: "#fff",
    fontSize: 20,
    textAlign: "center",
    margin: 7,
  },
  subView: {
    backgroundColor: "#535353",
    margin: 40,
    width: "80%",
    flex: 1,
    borderRadius: 30,
  },
  title: {
    fontSize: 20,
    fontWeight: "bold",
    textAlign: "center",
    paddingTop: 15,
    color: "#fff",
  },
  cardButtonRow1: {
    flexDirection: "row",
    marginLeft: 30,
    flexWrap: "wrap",
    marginTop: 220,
  },
  cardButtonRow2: {
    flexDirection: "row",
    flexWrap: "wrap",
    marginLeft: 30,
    bottom: 30,
  },
  buttonGroup: {
    backgroundColor: "#2369F0",
    width: "30%",
    height: "40%",
    borderRadius: 30,
    margin: 20,
  },
  btGroupText: {
    color: "#fff",
    textAlign: "center",
    padding: 3,
  },
  flatListText: {
    color: "red",
    fontSize: 26,
  },
});

I need to fetch data from given url. I gave state value to url param. It work perfectly, output object I assigned to state. when I console log that object, data come as json object. So I need that values print as Text in app. I used that for map function, but it does not work. Error or any issues dose not visible any where . please help. I’m testing with iphone7 . used CLI expo. I