This plugin adds variations to some core blocks and makes it easy to use blocks with dummy text and dummy images already entered.
It’s very lightweight because it just adds a “variation” of the core block.
<h3>Available Blocks</h3>
<ul>
<li>Lorem Paragraph</li>
<li>Lorem Paragraph (Long)</li>
<li>Lorem Heading</li>
<li>Lorem List</li>
<li>Lorem image</li>
<li>Lorem Columns</li>
<li>Lorem Media & Text</li>
</ul>

Lorem Ipsum Blocks

A plugin that makes it easy to use blocks with dummy text.

phillmill

Quickly populate Advanced Custom Fields with lorem ipsum text, placeholder stock images and more.
This plugin requires at least ACF Pro 5.8. 
If you don’t already own <a href="https://www.advancedcustomfields.com/pro/" rel="nofollow ugc">ACF Pro</a>, you should consider it. It’s one of the most powerful WordPress plugins available.
<h3>How It Works</h3>
When using this plugin there will be an eyedropper icon next to each ACF label in the admin that when clicked, will instantly auto-populate that field with sample content.
This applies to all ACF Pro field types!
<ul>
<li>Auto-populate image fields with stock/placeholder imagery</li>
<li>Auto-populate text fields with generated lorem ipsum</li>
<li>Auto-populate wysiwyg fields with lorem ipsum paragraphs</li>
<li>Auto-choose random posts & taxonomies on relational fields</li>
<li>Auto-choose values on Advanced fields </li>
<li>Auto-choose choices from choice fields</li>
<li>Auto-populate multiple rows of fields on Repeaters (PRO)</li>
<li>Auto-populate all layouts on Flexible Content fields (PRO)</li>
<li>Auto-populate all fields in Groups (PRO)</li>
<li>Auto-populate Galleries with placeholder images (PRO)</li>
<li>Auto-populate wysiwyg fields with rich content (PRO)</li>
</ul>
Field validation rules are taken in to a count and will be respected when using the auto-populator.
<a href="https://www.acfsamplecontent.com/?utm_source=Wordpress.org&utm_medium=Website&utm_campaign=ACF%20Sample%20Content%20Pro" rel="nofollow ugc">Upgrade to PRO</a>
<h3>Usage</h3>
There will be an eyedropper icon next to each ACF label in the admin that when clicked, will instantly auto-populate that field with sample content.
Eyedropper Icon Locations
<ul>
<li>Most fields: Next to the ACF field label</li>
<li>Field groups (PRO): When hovering over the field group meta box, the eyedropper icon will appear in the top right of the title bar</li>
<li>ACF Layout (PRO): When hovering over the layout’s title bar, the eyedropper icon will appear in the top right next to the other default ACF action icons</li>
</ul>
For most fields you will find an eyedropper icon next to the ACF field label that when clicked will do the sample content populate on that field. For field groups, you will find the eye dropper icon in the top right of the

Sample Content for ACF

Gives you the power to instantly populate fields with lorem ipsum text, placeholder images and more.

Lorem Ipsum Blocks vs Sample Content for ACF