Hello,
Please check the Theme Settings > Footer, if you use the widget area, you can edit the content in Appearance > Widgets:
https://xtemos.com/docs-topic/widgets-and-sidebars/
In case the content is added by HTML block (custom post type), you need to find the block and edit it: https://xtemos.com/docs-topic/html-blocks-usage/
You can check the mobile bottom navbar from Theme Settings > General > Mobile bottom navbar.
If you have any questions please feel free to contact us.
Best Regards.