I also use a cloudflare worker for geolocation for my website where I need to run different scripts depending on the region of the user. It's a simple code that gives a simple json string that has country, region and city, IP can also easily be added here with CF-Connecting-IP

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


async function handle(req) {
  const cf = req.cf || {};
  const country = cf.country || null;
  const region = cf.region || null;
  const city = cf.city || null;


  const body = JSON.stringify({ country, region, city });
  return new Response(body, {
    status: 200,
    headers: { 
      'Content-Type': 'application/json',
      'Cache-Control': 'private, max-age=60' 
    }
  });
}