1- The post thumbnail issue on the search result page is resolved now the plugin you see in this image is causing the issue: https://postimg.cc/ykZ5qFWm You activate more than 1-page builders plugins on your site and it will cause unexpected issues on the site I have disabled them for now and your issue is resolved to see result image: https://postimg.cc/crvKdJNM
2- There is no possible option in the theme to edit the search result page with Elementor. If you want paid Customization services submit a customization request to WPKraken team.
3- The images you shared with us were not able to be seen. Can you please elaborate on this issue by sharing a screenshot with us for a better reference?
Note: The plugins are enabled on your site all the plugins that were active are still activated on the site.
Regards 8Themes Team.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.