JS Morisset

WordPress updates the post/page modified time only when you save/update the post/page in the editor. If you have shortcodes or blocks that create dynamic content (ie. returning content from queries, files, feeds, etc.), the WordPress post/page modified time will not reflect these dynamic changes.
<h4>The Solution:</h4>
The JSM Accurate Modified Time for SEO plugin monitors the post/page content for changes and updates the WordPress post/page modified time as required.
If you use a social and search optimization plugin like WPSSO Core, Yoast SEO, The SEO Framework, Rank Math SEO, All in One SEO, etc., the Open Graph <code>og:updated_time</code> and <code>article:modified_time</code> meta tags, along with the Schema markup <code>dateModified</code> property, will show accurate modification times when shortcodes or blocks updates your post/page content.

JSM Accurate Modified Time for SEO (Yoast SEO, Rank Math SEO, All in One SEO, etc.)

Updates the WordPress post/page modified time when the output from a post/page shortcode or block changes.

freetools

LMP allows you to add in your sidebar a widget that will display the last modified articles in descending order of modification date.
Settings to customize:
<ul>
<li>Allow you to set title widget</li>
<li>Display Number of items</li>
<li>Display modified date</li>
<li>Display thumbnails</li>
</ul>
If no thumbnail was found for the article, LMP will add a generic image.

Last Modified Posts

Add a widget to display the list of the last modified/updated posts.

JSM Accurate Modified Time for SEO (Yoast SEO, Rank Math SEO, All in One SEO, etc.) vs Last Modified Posts