Select other roles as custom post authors

I created a custom post type (“Organization”), and I’ve also created a custom user role (“Representative”). Also, I’ve ensured that the Representative role has read/edit/create/publish post capabilities.

I then, programmatically, assigned a Representative as the “author” of the Organization.

When I am on the Organizations overview screen (WP Admin > Organizations), I see the proper representative in the “Author” column.

However, when editing the Organization, the “Author” dropdown only shows Admin/Editor/Contributors. It does not allow me to view/select Representatives as the author of an organization.

I’ve searched and cannot find the answer. Am I doing this wrong, or is there a way to hook into WP and have it recognize other roles?

Edit: Here is the Custom Post Type:

function cptui_register_my_cpts_organization_info() {

    /**
     * Post Type: Organizations.
     */

    $labels = (
        "name" => __( "Organizations", "hello-elementor-child" ),
        "singular_name" => __( "Organization", "hello-elementor-child" ),
        "menu_name" => __( "Organizations", "hello-elementor-child" ),
        "all_items" => __( "All Organizations", "hello-elementor-child" ),
        "add_new" => __( "Add New", "hello-elementor-child" ),
        "add_new_item" => __( "Add new Organization", "hello-elementor-child" ),
        "edit_item" => __( "Edit Organization", "hello-elementor-child" ),
        "new_item" => __( "New Organization", "hello-elementor-child" ),
        "view_item" => __( "View Organization", "hello-elementor-child" ),
        "view_items" => __( "View Organizations", "hello-elementor-child" ),
        "search_items" => __( "Search Organizations", "hello-elementor-child" ),
        "not_found" => __( "No Organizations found", "hello-elementor-child" ),
        "not_found_in_trash" => __( "No Organizations found in trash", "hello-elementor-child" ),
        "parent" => __( "Parent Organization:", "hello-elementor-child" ),
        "featured_image" => __( "Organization Logo", "hello-elementor-child" ),
        "set_featured_image" => __( "Upload Organization Logo", "hello-elementor-child" ),
        "remove_featured_image" => __( "Remove Organization Logo", "hello-elementor-child" ),
        "use_featured_image" => __( "Use as logo for this Organization", "hello-elementor-child" ),
        "archives" => __( "Organization archives", "hello-elementor-child" ),
        "insert_into_item" => __( "Insert into Organization", "hello-elementor-child" ),
        "uploaded_to_this_item" => __( "Upload to this Organization", "hello-elementor-child" ),
        "filter_items_list" => __( "Filter Organizations list", "hello-elementor-child" ),
        "items_list_navigation" => __( "Organizations list navigation", "hello-elementor-child" ),
        "items_list" => __( "Organizations list", "hello-elementor-child" ),
        "attributes" => __( "Organizations attributes", "hello-elementor-child" ),
        "name_admin_bar" => __( "Organization", "hello-elementor-child" ),
        "item_published" => __( "Organization published", "hello-elementor-child" ),
        "item_published_privately" => __( "Organization published privately.", "hello-elementor-child" ),
        "item_reverted_to_draft" => __( "Organization reverted to draft.", "hello-elementor-child" ),
        "item_scheduled" => __( "Organization scheduled", "hello-elementor-child" ),
        "item_updated" => __( "Organization updated.", "hello-elementor-child" ),
        "parent_item_colon" => __( "Parent Organization:", "hello-elementor-child" ),
    );

    $args = (
        "label" => __( "Organizations", "hello-elementor-child" ),
        "labels" => $labels,
        "description" => "",
        "public" => true,
        "publicly_queryable" => true,
        "show_ui" => true,
        "show_in_rest" => true,
        "rest_base" => "",
        "rest_controller_class" => "WP_REST_Posts_Controller",
        "has_archive" => true,
        "show_in_menu" => true,
        "show_in_nav_menus" => true,
        "delete_with_user" => false,
        "exclude_from_search" => false,
        "capability_type" => "post",
        "map_meta_cap" => true,
        "hierarchical" => false,
        "rewrite" => ( "slug" => "org", "with_front" => true ),
        "query_var" => true,
        "menu_icon" => "dashicons-networking",
        "supports" => ( "title", "editor", "thumbnail", "custom-fields", "author" ),
        "taxonomies" => ( "organization_services" ),
        "show_in_graphql" => false,
    );

    register_post_type( "organization_info", $args );
}

add_action( 'init', 'cptui_register_my_cpts_organization_info' );