Hi maroun,
Our social media team hand over some issues to assist you.
1. Based on this theme UI there has no pre-built option to add another column in the footer widgets area.
2. Section remove button not working issue. Please follow the steps below to fix the issue.
2a. If your server PHP version is older than 7.0 then please update your server PHP version to minimum 7.0.
2b. It’s can be a 3rd party plugin confliction issue. Please remove 3rd party plugins one by one except the theme required plugin to check the confliction.
2c. Please install and use the “Classic Editor” plugin as this theme still not ready for Gutenburg.
Best Regards,
ThemeLooks Support Team