Modules

Convert the default menu select widget with collapsible accordions, making it much easier to add a link to the proper position.

Some recent development activity, but still needs work.

Override field labels. Works in layout builder.

See also: https://www.drupal.org/project/field_display_label

Enhances file updloads with an interface to browse files directories.

Allows reuse of image files, but you have to know the directory structure and file name to find them.

Adds an edit layout operation link to content admin pages.

Works with nodes, blocks, media, etc.

Claims to streamline the layout builder UI for adding blocks but it isn't clear how.

API for custom entity clone forms.

Includes an example module for articles nodes and image style config.

See Entity Clone for drupal core entities.

Select entities to use a "Replicate" tab, which clones the entity.

Simple configuration UI for the Replicate module. 

Changes Replicate UI behavior to save cloned entities as unpublished and redirect to the edit form instead of view.

Create custom entity types and bundles via UI.

Very useful when you only need a custom type that can have bundles and fields.

Format a field using views.

Pass entity id, field values, and other arguments to the view.