Permanent Mobile Fix for 5 Pages

I have five WordPress landing pages built with Elementor on the Astra theme that keep slipping out of shape on phones and tablets. Every few weeks the same problems return: sections jump around, images refuse to resize and, on some devices, a few visuals disappear entirely... (Budget: $30 - $250 AUD, Jobs: Elementor, Mobile Development, Web Development, Website Optimization, WordPress)