Atsushi Shindo

This plugin lets you increase or decrease paragraph indentation by pressing Tab or Shift+Tab in the Gutenberg editor. 
From version 1.1.0, indentation inside the editor is represented by a simple <code><tab> × N</code> badge — ensuring clean, theme-independent preview — while the actual indentation remains visible on the front end.
FAQ Check on the site. 
https://it-libero.com/en/en-us/download/indent-paragraph-with-tab/
<h3>Settings</h3>
You can change the indentation value. 
1. Admin Settings > Indent Tab 
2. Indent Step input

Indent Paragraph with Tab

Adds intuitive Tab/Shift+Tab indentation control for paragraph blocks in Gutenberg.

cottboy

WordPress by default omits consecutive spaces and leading/trailing spaces. KeepSpace can automatically convert regular spaces to special character spaces to prevent them from being omitted.
Main functions:
<ul>
<li>Automatically convert regular spaces into special-character spaces</li>
<li>Supports four independent toggles for title, excerpt, content, and comments</li>
<li>Provides three types of special space characters to choose from</li>
</ul>
Three types of special space characters:
<ol>
<li>
Non-breaking space (\u00A0) – Recommended
<ul>
<li>Same visual effect as  </li>
<li>Counts as only 1 character and does not affect excerpt truncation</li>
</ul>
</li>
<li>
Chinese full-width space (\u3000)
<ul>
<li>In a Chinese environment, it’s very natural</li>
<li>The width is exactly one Chinese character</li>
</ul>
</li>
<li>
HTML Entity Space ( )
<ul>
<li>Best compatibility, supported by all browsers</li>
<li>Counting 5 characters will affect the summary extraction</li>
</ul>
</li>
</ol>

KeepSpace

Automatically convert regular spaces into special character spaces to prevent them from being omitted.

Indent Paragraph with Tab vs KeepSpace