If you somehow get a Netflix stream URL from your browser's developer tools, that URL includes your IP address as a signature. If you paste that URL into an M3U file and send it to a friend in another city, Netflix's CDN (Content Delivery Network) will reject the request with a 403 Forbidden error.
Subscribe to a legitimate IPTV provider for live TV (sports/news) and pay for Netflix separately. Use a universal search app like Reelgood or JustWatch to see where content lives, rather than trying to force Netflix into an M3U. netflix m3u file github