Ptah Dunbar

This plugin adds the ability to link to specific sidebars in the widgets admin page and have them open up automatically. In addition, by default when visiting the widgets admin page, none of the sidebars are open.
<pre><a href="<?php echo admin_url( 'widgets.php' ) .'?sidebar=aside'; ?>">Add Widgets</a></pre>
You’ll need to know the IDs of the sidebars you’d like to have opened. For multiple sidebars, simply separate them with commas.
<pre><a href="<?php echo admin_url( 'widgets.php' ) .'?sidebar=aside,body_open,before_the_loop'; ?>">Add Widgets</a></pre>
Alternatively, you can use the <code>add_widgets_link()</code> function:
<pre><?php echo waf_widgets_link( 'aside', 'Add Widgets to Aside' ); ?> <?php echo waf_widgets_link( 'aside,body_open,before_the_loop' ); ?></pre>

Widgets Admin Fix

This plugin adds the ability to link to specific sidebars in the widgets admin page and have them open up automatically.

Josh Hartman

Command your admin dashboard. Manage built-in widgets (Right Now, Recent Comments, etc.) and dynamically registered widgets (Google Analytics Summary, WP E-Commerce Dashboard, etc.). Hide widgets depending upon user capabilities.
This plugin is based upon Dave Kinkead’s Dashboard Heaven plugin and extends it to support dynamically registered widgets, such as dashboard widgets that are added by a plugin.
After installation access to all dashboard widgets is removed, then you can use the options at Settings > Dashboard Commander to configure the minimum access level for each widget.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/7YBOm5ov3vs?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Dashboard Commander

Command your admin dashboard. Manage built-in widgets and dynamically registered widgets. Hide widgets depending upon user capabilities.

Widgets Admin Fix vs Dashboard Commander