Simple solution to this problem you need to pass in disabled={true} or you could do something like this

import React from "react";

const App = () => {
  let platformData = ["And", "win", "ios"];
  let platform = "platform";
  let disabled = true;

  if (platform) // or any other kind of condition
      disabled = false;

  return (
    <div>
      <input
        type="radio"
        disabled={disabled}
        name="Platform"
        id="Platform"
        radioList={platformData}
        radioName={platform}
      />
    </div>
  );
};

export default App;