In route handlers, whenever it try to get the referer and origin from the headersList, it seems to show them as null, what am I doing wrong here ?

import { headers } from 'next/headers'
 
export async function GET(request: Request) {
  const headersList = headers()
  const referer = headersList.get('referer')
  const origin = headersList.get('origin')
  console.log({ origin, referer });
 
  return new Response('Hello, Next.js!', {
    status: 200,
    headers: { referer: referer },
  })
}