Andy Feliciotti

This plugin adds a “Unlisted?” checkbox in the “Publish” box while using the classic editor and Gutenberg. When this is checked the post will be excluded from most areas of your website by filtering pre_get_posts filter. This means posts will be excluded from RSS feeds, blog pages, widgets, category pages, archive pages, and more. Additionally it adds a noindex tag to the unlisted page to prevent Google from indexing the page. This is useful if you want to publish some information on your site and allows others to view it via the link without fully publishing.
Features
<ul>
<li>Simple checkbox to unlist posts when publishing a post</li>
<li>Allows you to hide posts from most areas of your site</li>
<li>Add a noindex tag to pages that are unlisted</li>
</ul>

Unlisted Posts

Allows you to easily exclude posts from feeds, category pages, blog pages and more using one checkbox on posts.

MartinCV

This plugin allows you to hide any posts on the home page, category page, search page, tags page, authors page, RSS Feed, REST API, Post Navigation, Native Recent Posts Widget, XML sitemaps, Yoast SEO sitemap, breadcrumbs and internal link suggestions.
<a href="https://demo.tastewp.com/whp-hide-posts" title="Demo" rel="nofollow ugc">Try the Demo</a>
<h4>Features:</h4>
<ul>
<li>Hide posts on specific archives and pages (home, categories, search, tags, authors, date, blog page, etc.)</li>
<li>Hide posts from RSS Feed and REST API</li>
<li>Hide posts from XML sitemaps (WordPress core and Yoast SEO)</li>
<li>Hide posts from Yoast SEO breadcrumbs and internal link suggestions</li>
<li>Full Gutenberg Block Editor support with metabox in sidebar</li>
<li>Works with Gutenberg Query Loop and Latest Posts blocks</li>
<li>Custom Post Types support – enable hide functionality for any post type</li>
<li>WooCommerce integration – hide products on store page, category pages, and REST API</li>
<li>Bulk Edit and Quick Edit support for efficient management</li>
<li>Custom database table for optimized performance</li>
<li>Comprehensive caching for fast page loads</li>
</ul>

Hide Posts

The plugin does exactly do what I was looking for the way I expected it to work without the need to configure anything. Thank you so much! If I wasn't a software developer myself, I'd hire you! And I'd donate, but I couldn't find any hint to the usual suspects ...

Magnificent

Allows you to hide any posts on the home page, category page, search page, tags page, authors page, RSS Feed, REST API, XML sitemaps, SEO integrations …

Unlisted Posts vs Hide Posts