Content appear over fixed elements when scrolling

When I preview or mirror my designs on my phone, some elements appear over fixed element when I am scrolling. This is the Figma file link so you can check it out for yourself and get an idea of what I am talking about - https://www.figma.com/design/mgHmH5CXnEyYv3X4n18uFx/Untitled?node-id=1-418&t=J4lasbNbPV69RTGx-1