Drupal - Layout Builder UI modules
Layout builder has been a great addition to Drupal core. However the UI and offcanvas nature of the the builder itself leaves a lot to be desired. Here are some modules that help fill in that niche of having a positive content editing experience.
LB contrib that replace the offcanvas menu
https://www.drupal.org/project/lb_plus
https://www.drupal.org/project/layout_builder_modal
https://www.drupal.org/project/layout_builder_iframe_modal
https://www.drupal.org/project/gin_lb
https://www.drupal.org/project/layout_builder_quick_add
https://www.drupal.org/project/layout_builder_widget
LB contrib that enhances the UI
https://www.drupal.org/project/layout_builder_browser
https://www.drupal.org/project/section_library
https://www.drupal.org/project/bootstrap_layout_builder
https://www.drupal.org/project/layout_builder_blocks
https://www.drupal.org/project/inline_block_title_automatic
https://www.drupal.org/project/layout_builder_admin_theme
https://www.drupal.org/project/layout_builder_component_attributes
https://www.drupal.org/project/layout_custom_section_classes
https://www.drupal.org/project/layout_builder_limit
https://www.drupal.org/project/layout_builder_lock
https://www.drupal.org/project/layout_builder_restrictions
https://www.drupal.org/project/layout_builder_reorder
https://www.drupal.org/project/layout_builder_sections_config
https://www.drupal.org/project/layoutbuilder_extras_live_update
https://www.drupal.org/project/layoutbuilder_extras