This Laravel Nova Tool gives your admins the ability to edit the robots.txt file from within the Nova control panel.
composer require razorcreations/nova-robots-editor
Add the following to your tools array in the app/Providers/NovaServiceProvider:
public function tools()
{
return [
// ...
new Razorcreations\NovaRobotsEditor\NovaRobotsEditor(),
];
}Robot icon made by Smashicons from www.flaticon.com