Renji

‘Only Pages in Feed’ is a little plugin that modifies WordPress RSS feed to exclude all ‘Post’ types and show only ‘Pages’ in it. So if you are using WordPress as a CMS and want only Pages to appear in your site feed, this plugin is for you.
The plugin needs no configuration. Just activate it, and you are good to go. Deactivating the plugin restores RSS feeds to their default state.
<h4>Plugin Page</h4>
SumTips (<a href="http://sumtips.com/2011/12/include-page-custom-post-type-wordpress-feed.html" rel="nofollow ugc">http://sumtips.com/wp-page-in-feed</a>)

Only Pages in Feed

Remove all blog posts from site's RSS feeds, leaving only Pages.

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.

Only Pages in Feed vs Unlisted Posts