lukaiser

ILAnnotations allows you to select a text in a blog post and add your comment to it. 
The plugin uses the standard comments engine of WordPress, so all other comment plugins should work just fine with it. 
Shortcodes are used to mark the highlighted text. This allows you to still edit a post and move stuff around without losing the annotations.

ILAnnotations

Annotate any text in a blog post and add a comment to it.

arhamashfaq

Previu lets you share a review link with your client. They click it, type their name, and start leaving visual feedback directly on your Elementor site — no account required.
No more confusing emails, messy screenshots, or lost comments. Clients pin feedback on the exact element they are referring to — desktop, tablet, or mobile.
Features:
<ul>
<li>Pin comments on any element with exact positioning</li>
<li>Draw rectangles, arrows, and freehand annotations</li>
<li>Switch between desktop, tablet, and mobile viewports</li>
<li>View and resolve all feedback inside the Elementor editor panel</li>
<li>Manage annotations from the WordPress admin dashboard</li>
<li>Email notifications when clients leave new feedback</li>
<li>Voice notes and file attachments (Pro)</li>
<li>Slack integration (Pro)</li>
<li>White-label and custom branding (Pro)</li>
</ul>

Previu – Visual Client Feedback for Elementor

Generate shareable review links for clients to annotate your Elementor site with pins, arrows and comments. No client account required.

ILAnnotations vs Previu – Visual Client Feedback for Elementor