WIP Bard Content migration from Statamic to Drupal. Not complete or robust, but working for my use case right now

BardContent.php

<?php

namespace Drupal\migrate_statamic\Plugin\migrate\process;

use Drupal\Component\Transliteration\TransliterationInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\migrate\MigrateExecutableInterface;
use Drupal\migrate\ProcessPluginBase;
use Drupal\migrate\Row;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a migrate_statamic_bard_content plugin.
 *
 * Usage:
 *
 * @code
 * process:
 *   bar:
 *     plugin: migrate_statamic_bard_content
 *     source: foo
 *     type_map:
 *       centered_content:
 *         type: centered_content
 *         fields:
 *           sub_heading: field_sub_heading
 *           main_content: field_main_content
 *       text:
 *         type: basic_text
 *         fields:
 *           text: field_text
 * @endcode
 *
 * @MigrateProcessPlugin(
 *   id = "migrate_statamic_bard_content"
 * )
 *
 * @DCG
 * ContainerFactoryPluginInterface is optional here. If you have no need for
 * external services just remove it and all other stuff except transform()
 * method.
 */
class BardContent extends ProcessPluginBase implements ContainerFactoryPluginInterface {

  /**
   * Constructs a BardContent plugin.
   *
   * @param array $configuration
   *   The plugin configuration.
   * @param string $plugin_id
   *   The plugin ID.
   * @param mixed $plugin_definition
   *   The plugin definition.
   * @param \Drupal\Component\Transliteration\TransliterationInterface $transliteration
   *   The transliteration service.
   */
  public function __construct(
    array $configuration,
    $plugin_id,
    $plugin_definition,
    private readonly EntityTypeManagerInterface $entity_type_manager,
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('entity_type.manager')
    );
  }

  /**
   * {@inheritdoc}
   */
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    $type = $value['type'];
    $type_info = $this->configuration['type_map'][$type];
    $stub = $this->entity_type_manager->getStorage('paragraph')->create([
      'type' => $type_info['type'],
    ]);
    foreach ($type_info['fields'] as $source => $destination) {

      if (array_key_exists('allowed_formats', $stub->get($destination)->getSettings())) {
        $data = [
          'format' => 'markdown',
          'value' => $value[$source],
        ];
      } else {
        $data = $value[$source];
      }
      $stub->set($destination, $data);
    }
    $stub->save();
    return [
      'target_id' => $stub->id(),
      'target_revision_id' => $stub->getRevisionId(),
    ];
  }

}

migrate_plus.migration.statamic_article.yml

langcode: en
status: true
dependencies:
  enforced:
    module:
      - migrate_plus
id: statamic_article
class: null
field_plugin_method: null
cck_plugin_method: null
migration_tags:
  - 'statamic content'
migration_group: 'Statamic Site'
label: 'Statamic Articles'
source:
  plugin: url
  data_fetcher_plugin: http
  data_parser_plugin: json
  urls:
    - 'your_website_url'
  item_selector: data
  fields:
    -
      name: id
      label: Id
      selector: id
    -
      name: title
      label: Title
      selector: title
    -
      name: content
      label: 'Main content'
      selector: content
    -
      name: excerpt
      label: Excerpt
      selector: excerpt
    -
      name: url
      label: 'Source URL'
      selector: permalink
    -
      name: author
      label: Author
      selector: author/0/id
    -
      name: bard_content
      label: 'Bard Content'
      selector: bard_content
  ids:
    id:
      type: uuid
process:
  type:
    plugin: default_value
    default_value: article
  title: title
  body/format:
    plugin: default_value
    default_value: markdown
  body/value: content
  body/summary: excerpt
  sticky:
    plugin: default_value
    default_value: 0
  path/alias:
    plugin: str_replace
    source: url
    search: 'http://yourdomainhere'
    replace: ''
  path/pathauto:
    plugin: default_value
    default_value: false
  uid:
    plugin: migration_lookup
    migration: statamic_users
    source_ids:
      statamic_users:
        - author
  field_remixables:
    plugin: migrate_statamic_bard_content
    source: bard_content
    type_map:
      centered_content:
        type: centered_content
        fields:
          sub_heading: field_subheading
          heading: field_heading
          lead_copy: field_lead_copy
          main_content: field_main_content
      text:
        type: text
        fields:
          text: field_text
      basic:
        type: text
        fields:
          body: field_text
      figure:
        type: figure
        fields:
          figure_caption: field_figure_caption
          figure_image: field_figure_image
destination:
  plugin: 'entity:node'
migration_dependencies:
  required:
    - statamic_users