Drupal 9 - Read custom block body content

Drupal 9 - Read custom block body content:

$block = \Drupal\block\Entity\Block::load('block_machine_name');

if ($block) {

$blockuuid = $block->getPlugin()->getDerivativeId();

  $blockContent = \Drupal::service('entity.repository')

->loadEntityByUuid('block_content', $blockuuid);

  $vsf_form_message = $blockContent->get('body')->value;

}

Happy coding!