Recreate the Divi “Projects” Custom Post Type

This will register the Projects CPT so it will be accessible after disabling the Divi theme.

<?php
/**
* Register 'project' post type, 'project_category' and 'project_tag' taxonomies.
*/
add_action( 'init', function () {
$labels = [
'name'               => esc_html__( 'Projects', 'et_builder' ),
'singular_name'      => esc_html__( 'Project', 'et_builder' ),
'add_new'            => esc_html__( 'Add New', 'et_builder' ),
'add_new_item'       => esc_html__( 'Add New Project', 'et_builder' ),
'edit_item'          => esc_html__( 'Edit Project', 'et_builder' ),
'new_item'           => esc_html__( 'New Project', 'et_builder' ),
'all_items'          => esc_html__( 'All Projects', 'et_builder' ),
'view_item'          => esc_html__( 'View Project', 'et_builder' ),
'search_items'       => esc_html__( 'Search Projects', 'et_builder' ),
'not_found'          => esc_html__( 'Nothing found', 'et_builder' ),
'not_found_in_trash' => esc_html__( 'Nothing found in Trash', 'et_builder' ),
'parent_item_colon'  => '',
];
$args = [
'labels'             => $labels,
'public'             => true,
'publicly_queryable' => true,
'show_ui'            => true,
'can_export'         => true,
'show_in_nav_menus'  => true,
'query_var'          => true,
'has_archive'        => true,
'rewrite'            => apply_filters(
'et_project_posttype_rewrite_args',
[
'feeds'      => true,
'slug'       => 'project',
'with_front' => false,
]
),
'capability_type'    => 'post',
'hierarchical'       => false,
'menu_position'      => null,
'show_in_rest'       => true,
'supports'           => [
'title',
'author',
'editor',
'thumbnail',
'excerpt',
'comments',
'revisions',
'custom-fields'
],
];
register_post_type( 'project', apply_filters( 'et_project_posttype_args', $args ) );
$labels = [
'name'              => esc_html__( 'Project Categories', 'et_builder' ),
'singular_name'     => esc_html__( 'Project Category', 'et_builder' ),
'search_items'      => esc_html__( 'Search Categories', 'et_builder' ),
'all_items'         => esc_html__( 'All Categories', 'et_builder' ),
'parent_item'       => esc_html__( 'Parent Category', 'et_builder' ),
'parent_item_colon' => esc_html__( 'Parent Category:', 'et_builder' ),
'edit_item'         => esc_html__( 'Edit Category', 'et_builder' ),
'update_item'       => esc_html__( 'Update Category', 'et_builder' ),
'add_new_item'      => esc_html__( 'Add New Category', 'et_builder' ),
'new_item_name'     => esc_html__( 'New Category Name', 'et_builder' ),
'menu_name'         => esc_html__( 'Categories', 'et_builder' ),
'not_found'         => esc_html__( "You currently don't have any project categories.", 'et_builder' ),
];
$project_category_args = [
'hierarchical'      => true,
'labels'            => $labels,
'show_ui'           => true,
'show_admin_column' => true,
'query_var'         => true,
'show_in_rest'      => true,
];
register_taxonomy( 'project_category', [ 'project' ], $project_category_args );
$labels = [
'name'              => esc_html__( 'Project Tags', 'et_builder' ),
'singular_name'     => esc_html__( 'Project Tag', 'et_builder' ),
'search_items'      => esc_html__( 'Search Tags', 'et_builder' ),
'all_items'         => esc_html__( 'All Tags', 'et_builder' ),
'parent_item'       => esc_html__( 'Parent Tag', 'et_builder' ),
'parent_item_colon' => esc_html__( 'Parent Tag:', 'et_builder' ),
'edit_item'         => esc_html__( 'Edit Tag', 'et_builder' ),
'update_item'       => esc_html__( 'Update Tag', 'et_builder' ),
'add_new_item'      => esc_html__( 'Add New Tag', 'et_builder' ),
'new_item_name'     => esc_html__( 'New Tag Name', 'et_builder' ),
'menu_name'         => esc_html__( 'Tags', 'et_builder' ),
];
$project_tag_args = [
'hierarchical'      => false,
'labels'            => $labels,
'show_ui'           => true,
'show_admin_column' => true,
'query_var'         => true,
'show_in_rest'      => true,
];
register_taxonomy( 'project_tag', [ 'project' ], $project_tag_args );
} );