Filter WordPress Gutenberg Block Output

filter-gutenblock.php

<?php 
add_filter('render_block', function ($block_content, $block) {
  // Remove the block/timed-block from the rendered content.

  if ('core/paragraph' === $block['blockName']) {
      $block_content = "<div class='wp-block' data-blockType='{$block['blockName']}'>{$block_content}</div>";

  }
  return $block_content;
}, 10, 2);