GuyPrimavera

This open source and lightweight plugin allows users with the role Editor or Shop Manager to access the Menus and Widgets areas of the Appearance menu in WordPress’ admin area.
This is a common task that would be useful for clients to manage themselves to give them more control over their website’s content.
This plugin also gives access to the Customize submenu and other theme options, but these can be hidden through the options page at Appearance > Editor Access if you wish.
You can also select other menus to hide from Editors and Shop Managers (e.g. custom theme or plugin options pages), as well as hiding any elements on the Admin Bar.
Features
<ul>
<li>Allow access to Customize, Menus and Widgets for Editors and Shop Managers.</li>
<li>Theme Options remain hidden from these user roles.</li>
<li>Hide custom options pages from these users (if your theme/plugin has a custom settings page you wish to hide).</li>
<li>Hide any other menus or submenus. Simply select which menus you wish to hide.</li>
<li>Hide admin bar menus and elements. Choose which elements you wish to hide.</li>
</ul>

Editor Menu and Widget Access

Ideal

Allow and control Editor and Shop Manager access to the menus, widgets and appearance menu, plus other menus and adminbar items.

SEO Neo

The REST API Extender is a WordPress plugin that extends the functionality of the WordPress REST API.
It provides two main features:
<ol>
<li>Permalink Options Management 
This plugin allows you to update the permalink settings of your WordPress site via the REST API. You can change the permalink structure, category base, and tag base using a simple POST request.</li>
</ol>
To update the permalink settings, send a POST request to the following endpoint: 
/wp-json/raext/permalink-options/v1/settings
The request body should include the following parameters:
<ul>
<li><code>permalink_structure</code> (string): The new permalink structure.</li>
<li><code>category_base</code> (string, optional): The new category base.</li>
<li><code>tag_base</code> (string, optional): The new tag base.</li>
</ul>
Example request: 
POST /wp-json/raext/permalink-options/v1/settings 
Content-Type: application/json
{ 
“permalink_structure”: “/%year%/%postname%/”, 
“category_base”: “categories”, 
“tag_base”: “tags” 
}
<ol>
<li>Theme Installation and Activation 
The plugin also enables you to install and activate themes from a remote URL using the REST API. You have to provide the theme URL, stylesheet, and slug, and the plugin will handle the installation and activation process.</li>
</ol>
To install and activate a theme from a remote URL, send a POST request to the following endpoint: 
/wp-json/raext/theme-manager/v1/install
The request body should include the following parameters:
<ul>
<li><code>theme_url</code> (string): The URL of the theme ZIP file.</li>
<li><code>theme_stylesheet</code> (string): The stylesheet of the theme (e.g., <code>twentytwenty</code>).</li>
<li><code>theme_slug</code> (string): The slug of the theme (e.g., <code>twentytwenty</code>).</li>
</ul>
Example request: 
POST /wp-json/raext/theme-manager/v1/install 
Content-Type: application/json
{ 
“theme_url”: “https://example.com/themes/twentytwenty.zip”, 
“theme_stylesheet”: “twentytwenty”, 
“theme_slug”: “twentytwenty” 
}
Developed by the creators of <a href="https://seoneo.io/" rel="nofollow ugc">SEO Neo</a>
<h3>Permissions</h3>
Both the permalink options management and theme installation/activation features require the user to have the <code>manage_options</code> capability (an administrator role).

REST API Extender

The REST API Extender is a WordPress plugin that extends the functionality of the WordPress REST API.

Editor Menu and Widget Access vs REST API Extender