We understand that you are experiencing an issue with the Yoast SEO plugin in that the highlight feature is not working as expected when using Elementor. We are aware of this issue with Yoast SEO and there is currently an issue report open with our developers here: https://github.com/Yoast/wordpress-seo/issues/12459. Whereas we are unable to provide an ETA as to when this will be resolved, you can monitor the issue report page for updates on it’s resolution.
Unfortunately, the eye marker feature is only available in the default Visual editor. If you’re using the WordPress native content editor, please make sure that you’re using the Visual mode instead of using the Text mode to make sure that the Yoast SEO eye marker feature can highlight the specific parts of your content. In some cases, you may need to update the content or refresh the page to be able to activate the eye marker.