Image widget crop not returning multiple derivatives in JSON API
You can try the code

use Drupal\image\Entity\ImageStyle;
use Drupal\file\Entity\File;


$filed_images = $paragraphs-&gt;get('field_image')-&gt;getValue();
 $images =[];
 foreach ($filed_images as $image) {
            $images[] = ImageStyle::load('273x273')
              -&gt;buildUrl(File::load($image['target_id'])
                -&gt;getFileUri());
          }