React Select All for multiple checkboxes

import React, { useState, useEffect } from "react";
import "./styles.css";

export default function App() {
  const [checkedAll, setCheckedAll] = useState(false);
  const [checked, setChecked] = useState({
    nr1: false,
    nr2: false
  });

  /* ################################################ */
  /* #### TOGGLES checK STATE BASED ON inputName #### */
  /* ################################################ */

  const toggleCheck = (inputName) => {
    setChecked((prevState) => {
      const newState = { ...prevState };
      newState[inputName] = !prevState[inputName];
      return newState;
    });
  };

  /* ###################################################### */
  /* #### CHECKS OR UNCHECKS ALL FROM SELECT ALL CLICK #### */
  /* ###################################################### */

  const selectAll = (value) => {
    setCheckedAll(value);
    setChecked((prevState) => {
      const newState = { ...prevState };
      for (const inputName in newState) {
        newState[inputName] = value;
      }
      return newState;
    });
  };

  /* ############################################# */
  /* #### EFFECT TO CONTROL CHECKED_ALL STATE #### */
  /* ############################################# */

  // IF YOU CHECK BOTH INDIVIDUALLY. IT WILL ACTIVATE THE checkedAll STATE
  // IF YOU UNCHECK ANY INDIVIDUALLY. IT WILL DE-ACTIVATE THE checkAll STATE

  useEffect(() => {
    let allChecked = true;
    for (const inputName in checked) {
      if (checked[inputName] === false) {
        allChecked = false;
      }
    }
    if (allChecked) {
      setCheckedAll(true);
    } else {
      setCheckedAll(false);
    }
  }, [checked]);

  /* ########################## */
  /* #### RETURN STATEMENT #### */
  /* ########################## */

  return (
    <div className="App">
      <div>
        <label>All</label>
        <input
          type="checkbox"
          onChange={(event) => selectAll(event.target.checked)}
          checked={checkedAll}
        />
      </div>
      <div>
        <label>1</label>
        <input
          type="checkbox"
          name="nr1"
          onChange={() => toggleCheck("nr1")}
          checked={checked["nr1"]}
        />
      </div>
      <div>
        <label>2</label>
        <input
          type="checkbox"
          name="nr2"
          onChange={() => toggleCheck("nr2")}
          checked={checked["nr2"]}
        />
      </div>
    </div>
  );
}

I wish to create a Select All Checkbox functionality as shown in the following code: https://codesandbox.io/s/festive-framework-8l2ez?file=/src/App.js

How can I use the above code for an array of checkboxes? I believe that it can be sorted out using map but I'm not able to implement it. In the above code, the value is being set for nr1 and nr2 separately.