Technically there is a difference between a not found (with a status code 404) and a not allowed (with a status code 405)

Laravel give you a lot of options for handling exceptions.

An option that can be useful for you is Rendering Exceptions

use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
 
/**
 * Register the exception handling callbacks for the application.
 *
 * @return void
 */
public function register()
{
    // This will throw a 404 / not found exception if we try to render a MethodNotAllowedHttpException (like if we do a GET on a POST url.
    $this->renderable(function (MethodNotAllowedHttpException $e, $request) {
        abort(404);
    });
}