Hello,
Please check the Theme Settings > Footer. If your Footer content is displayed by the widget, find the widget area in Appearance > Widgets, and replace the titles in the widgets: https://xtemos.com/docs-topic/widgets-and-sidebars/
In case you display the content by HTML block, you need to find the HTML and edit it with the builder as you edit any page: https://xtemos.com/docs-topic/html-blocks-usage/
If you have any questions please feel free to contact us.
Best Regards