How can I tell if middleware is processing anything? Cors issue.

I created a middleware class to handle cors for me:

$app->middleware([
    App\Http\Middleware\CorsMiddleware::class,
]);

That class above looks somewhat like this:

class CorsMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        var_dump(1);die;
       ......

Now when I do a request, i do not see the var_dump(). Is it not being run?

I am trying to solve this cors issue: Access to fetch at 'http://localhost:8000/feedback/add' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. By doing this: https://www.codementor.io/@chiemelachinedum/steps-to-enable-cors-on-a-lumen-api-backend-e5a0s1ecx

Also it seems when I go directly to: http://localhost:8000/feedback/add in my browser, then It seems to work fine. I see the vardump

Any ideas?