Workers with route configured are not being triggered

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

async function handleRequest(request) {
  const url = new URL(request.url)

  console.log("Hostname:", url.hostname);

  url.hostname = 'other_domain.com'

  const modifiedRequest = new Request(url, request)
  modifiedRequest.headers.set('Host', url.hostname)

  return fetch(modifiedRequest)
}

export default {
  async fetch(request, env, ctx) {
    return handleRequest(request);
  },
};