The Read More element is supported by the native ‘<!--more-->' WordPress tag which sets the preview text that will be displayed for blog posts in archive pages.
Content Tab
Read More
- Read More Text - Type here the link text something like Continue reading, or Show More.
Note: This widget only affects themes that use `the_content` in archive pages. It has no impact on archives designed using Elementor.
Set the settings for the Advanced Tab that is appropriate for the element.