ska-dev

Adds a compact group of additional buttons to the Block Editor toolbar that allow to perform common actions without using hotkeys or opening dropdown menus.
Available actions:
<ul>
<li>Insert before</li>
<li>Insert after</li>
<li>Group</li>
<li>Ungroup</li>
<li>Copy</li>
<li>Cut</li>
<li>Duplicate</li>
<li>Delete</li>
<li>Strip metadata</li>
</ul>

ska-toolbar

Adds a toolbar with quick actions to the Block Editor.

jneuveglise

This plugin will cut your RSS feeds at the “more” tag. It will enable you subscriber to see what you want them to see as on the home of your blog.
It will also add a customizable link at the bottom to the complete article and optionally a fully configurable footer to avoid robots to steal your content.
It will not work if you choose ‘partial’ feeds in the WP configuration.

RSS No More

This plugin will cut your RSS feeds at the 'more' tag or custom [rss-cut] tag and optionally append a footer to each article on your RSS fee …

ska-toolbar vs RSS No More