Query building for filter based on select dropdown in laravel

Question

I'm a bit starter in the Laravel system so please bear with me.

Currently I have stored images in the database and they have columns featured and approved. They both have status 0, and 1. Approved/Not approved.

What I'm trying to to is to be able to filter from the admin dashboard:

• All images ( this will be all images no mater what status they have - 0 and 1
• Only approved - status 1
• Not approved - status 0

This is what I have in my index.blade.php

<div class="col-md-2">
   <div class="form-group">
      <label for="featured">Featured</label>
          <select class="form-control" name="featured" id="featured">
          <option value=""> All</option>
          <option value="1">Yes</option>
          <option value="0">No</option>
      </select>                 
   </div>            
</div>
<div class="form-group">
   <label for="approved">Approved</label>
       <select class="form-control" name="approved" id="approved">
            <option value=""> All</option>
            <option value="1">Yes</option>
            <option value="0">No</option>
       </select>                 
</div> 
<button type="submit" class="btn btn-primary">Search</button>

And this is the query that I'm trying to build in the controller

public function index(Request $request)
{        
    $approved = $request->approved;
    $featured = $request->featured;
    
    $images = Images::when($approved, function($query, $approved) {
        if ($approved == '0') {
            return $query->where('approved', 0);
        } else if ($approved == '1' ){
            return $query->where('approved', 1);
        } else {
            return $query->where('approved', [0,1]);
        }           
    })
    ->when($featured, function($query, $featured) {
        if ($featured == '0') {
            return $query->where('featured', 0);
        } else if ($featured == '1' ){
            return $query->where('featured', 1);
        } else {
            return $query->where('featured', [0,1]);
        }   
    })
    ->latest()->get();
    
    return view( .... );
}

This is what I have in route

Route::resource('images', 'ImagesController')->except('show');

First problem is that when I choose option "All" it doesn't show anything, and when I choose "No" or "Yes" it shows same results.

I also don't think that this is the correct way of building such query.