Modify the WP dashboard - remove dashboard widgets and other furniture we don't need.

dashboard-setup.inc.php

<?php
/**
 * Plugin Name:     eggMUP: WP Admin Dashboard Setup
 * Plugin URI:      https://gist.github.com/ianpegg/0e3beb746757916d46f636f12b6d6a44
 * Description:     Modify the WP dashboard - remove dashboard widgets & other furniture we don't need.
 * Version:         1.1.0
 * Author:          Ian Pegg
 * Author URI:      https://eggcupwebdesign.com
 * php version 8.2.14
 *
 * @category Must_Use_Plugin
 * @package  WordPress_Plugin
 * @author   Ian Pegg <[email protected]>
 * @license  GNU/GPLv3 https://www.gnu.org/licenses/gpl-3.0.txt
 * @link     https://eggcupwebdesign.com
 */

namespace EggCup\MUP\DashboardSetup;

if (!defined('ABSPATH')) {
    exit;
}


/**
 * Adds a reusable blocks menu so that design patterns can be
 * easily managed independently of the page editor:
 *
 * @return void
 */
add_action('admin_menu', function () {
    if (true == current_user_can('manage_options')) {
        /**
         * Add a menu item to manage reusable blocks:
         * @link https://www.billerickson.net/reusable-blocks-accessible-in-wordpress-admin-area
         */
        add_menu_page(
            'Reusable Blocks',
            'Reusable Blocks',
            'edit_posts',
            'edit.php?post_type=wp_block',
            '',
            'dashicons-welcome-widgets-menus',
            20
        );
    }
}, 999);


/**
 * Removes WordPress menu from admin bar:
 *
 * @param Object $wp_admin_bar Admin bar object provided by core
 *
 * @return void
 */
add_action('admin_bar_menu', function ( $wp_admin_bar ) {
    $wp_admin_bar->remove_node('wp-logo');
}, 999);


/**
 * Removes default dashboard widgets:
 *
 * @return void
 */
add_action('wp_dashboard_setup', function () {
    remove_action('welcome_panel', 'wp_welcome_panel');

    remove_meta_box('dashboard_plugins', 'dashboard', 'normal');
    remove_meta_box('dashboard_activity', 'dashboard', 'normal');
    remove_meta_box('dashboard_quick_press', 'dashboard', 'side');

    // WordPress blog feed:
    remove_meta_box('dashboard_primary', 'dashboard', 'side');
    // Other WordPress news:
    remove_meta_box('dashboard_secondary', 'dashboard', 'side');

    // The new authors of Search Exclude added a dashboard widget nobody wanted:
    remove_meta_box('wp-dashboard-widget-news', 'dashboard', 'normal');

    // Remove Yoast widget for users without SEO privileges:
    if (!current_user_can('wpseo_edit_advanced_metadata')) {
        remove_meta_box('wpseo-dashboard-overview', 'dashboard', 'side');
    }
});


/**
 * Remove meta boxes depending upon user privileges:
 * 
 * @return void
 */
add_action('add_meta_boxes', function () {
    /**
     * Remove a bunch of boxes for non admins:
     */
    if (!current_user_can('manage_options')) {
        remove_meta_box('linktargetdiv', 'link', 'normal');
        remove_meta_box('linkxfndiv', 'link', 'normal');
        remove_meta_box('linkadvanceddiv', 'link', 'normal');
        remove_meta_box('postcustom', 'post', 'normal');
        remove_meta_box('slugdiv', 'post', 'normal');
    }

    /**
     * Remove Yoast for users without SEO privileges:
     */
    if (!current_user_can('wpseo_edit_advanced_metadata')) {
        remove_meta_box('wpseo_meta', 'post', 'normal');
        remove_meta_box('authordiv', 'post', 'normal');
        remove_meta_box('sep_metabox_id', 'post', 'side');
    }
});


/**
 * Customises the WP admin dashboard footer message:
 *
 * @return void
 */
add_filter('admin_footer_text', function () {
    echo
        '<p>'
            . 'A bespoke <a href="https://www.wordpress.org">WordPress</a> website. '
            . 'Hand crafted in Norwich, England by '
            . '<a href="https://eggcupwebdesign.com/">eggcup</a>'
        . '</p>';
}, 999);