I guess you have misunderstood the issue. Please compare the image of the lady standing with a helmet (about us bg image) on desktop and mobile. On mobile you can only see her arm. That’s the actual issue. We need to fix that, either through horizontal scroll or some other tweak.
Kindly send us your URL of the site and WordPress admin details (Username & Password) via email:firstname.lastname@example.org Please mention this forum URL while replying so that we understand what needs to be done.