The Design Update: [Help needed] Examples of shrinking mobile header while scrolling

Hey fellow redditors, I've recently worked on a project and developed a shrinking animation with the mobile header (which contains some icons, a logo and an hamburger menu). The client wants to have some examples of other website that does it. I am in dire need of somes but I can't quite find them. I know I've seen them somewhere :)

Thank you for your time, have a nice day