Simon Hamp

It works with Posts, Pages and Custom Post Types, giving you a really simple way to make one post refer to another. Not to be confused with automated “Related Posts” plugins.
It’s probably most handy for Custom Post Types, where you may want to display a list of similar items based on factors that are indeterminable for an automatic algorithm.
Current Limitations
<ul>
<li>It’s only a one-way reference for now</li>
<li>It’s limited to linking posts of the same type</li>
</ul>
If you need help or have ideas for more features, please use the plugin forum.
<h3>Coming Soon</h3>
<ul>
<li>Admin panel for changing some basic options</li>
<li>Linking posts of different types</li>
<li>More flexible rendering of linked posts</li>
<li>Ordering of linked posts</li>
</ul>

FS Link Posts

FS Link Posts is a simple plugin to enable you to manually associate a post with other posts you’ve created.

shazdeh

The shortcode requires the widget ID, but no need to guess, the plugin generates the code for you. To override the widget title for a widget you can use the “title” parameter: 
 [widget id=”text-1″ title=”New title”] 
You can also hide the widget title entirely if desired: 
 [widget id=”text-1″ title=”0″]
Additional Parameters:
<ul>
<li>container_tag: the HTML tag to use for the widget container, default: <code>div</code></li>
<li>container_class: CSS classname added to the widget container, default: <code>widget %2$s</code> (Note: uses sprintf for variable substitution)</li>
<li>container_id: HTML ID attribute for the widget container, default: <code>%1$s</code> (Note: uses sprintf for variable substitution)</li>
<li>title_tag: HTML tag to use for the widget title wrapper, default: <code>h2</code></li>
<li>title_class: CSS classname for the widget title wrapper, default: <code>widgettitle</code></li>
</ul>

Widget Shortcode

I had tried another plugin to use a widget in the gutenberg block editor on a page, however that plugin had some issues so was not ideal.

Widget shortcode enabled me to add my widget by copying the generated shortcode to the shortcode block in the block editor, resulting in the widget being displayed perfectly on the page. 

Works perfectly with the block editor

Adds [widget] shortcode which enables you to output widgets anywhere you like.

FS Link Posts vs Widget Shortcode