Hi,
The you can observe the same behaviour on your theme here : https://xstore.8theme.com/elementor/
Open it in mobile view. Then try to open mobile navigation. The GDPR info box will stay on top of the nav menu. The weirdest part is that z-index quick fix does not work in here, no idea why.
Ideally this would be really nice if you could handle it like sales booster plugin for Fake Sales Popup does. See here https://xstore.8theme.com/elementor/demos/minimal-fashion02/product/beachwear-vintage/
Whenever you open mobile nav it just slides it off screen and when you close the menu it slides the sales booster popup back in view.
However, can you provide me with quick fix for now at least? js, php, whatever. just so it works. because for now it successfully hides content on the bottom of mobile nav on my site.