layout_builder_block_clone.module

<?php

use Drupal\layout_builder_block_clone\Element\CloneLayoutBuilderBlock;

/**
 * Implements hook_element_info_alter().
 * @param array $info
 */
function layout_builder_block_clone_element_info_alter(array &$info) {
  if (isset($info['layout_builder'])) {
    // Add 'clone' to metadata operations.
    $info['layout_builder']['#pre_render'][] = [
      0 => CloneLayoutBuilderBlock::class,
      1 => 'preRenderLayoutBuilder',
    ];
  }
}