Laravel AdminLTE - How to call method and use its data in view

I am using Laravel AdminLTE and I have it all configured, there is just one part I do not understand. I made my route like so:

Route::get('/admin/painlevel', function () {
    return view('painlevel');
});

and I have this method in app/Http/Controllers/v1/PainLevelController.php

public function index()
{
     return PdTpainlevel::select('pkpainlevel as id', 'painlevel_name as name')->get();
}

How would I call that method and display the data in my painlevel view?

#php #laravel