Hello,
1) Theme Options > Header builder > edit the header content/remove unrequired elements.
2) Do you mean responsive of the header? Using the Header builder you can build 2 headers for desktop and mobile – http://prntscr.com/10u30ei , go to Theme Options > General and select “Mobile Header Starts From”.
3) Yes, you can. You can use options of Elementor – http://prntscr.com/10u32lo
https://elementor.com/help/mobile-editing/
Regards















