You can use Layout Builder Kit with Paragraphs, which also has its own ecosystem (the modules marked as being part of the Paragraphs ecosystem are located here).
Here are some of the modules you will want to investigate:
https://www.drupal.org/project/paragraphs_collection
https://www.drupal.org/project/classy_paragraphs
https://www.drupal.org/project/paragraph_view_mode
https://www.drupal.org/project/paragraph_editor_enhancements
https://www.drupal.org/project/paragraphs_base
https://www.drupal.org/project/parade
https://www.drupal.org/project/paragraphs_tabs
https://www.drupal.org/project/a11y_paragraphs_tabs
https://www.drupal.org/project/paragraph_blocks
Drupal Paragraph Blocks Demo (Apr 14, 2019)