Hey, I’ve entered your site and played around the footer in responsive mode.
Seems like the mobile version of the “menu” in the footer is designed to be vertical, once the Width falls beneath ~600px.
In general, you can’t edit your header and footer directly through Elementor, it’s only achievable using the Pro plugin.
If your header and footer are considered a part of your theme, try to edit your theme(advanced users only).
Otherwise, I’d suggest trying a footer-header builder, Our Hello Theme provides this function in the Appearance > Customize in the WP dashboard. Other plugins can also achieve this function (including our Pro plugin)
Hope it helps.