Showing Condensed Menu on Site

Hi,
I have support access on for p4kdating.com. The sie uses an elementor template build in the theme builder. The client wants a condensed menu shown like you see on mobile. What I mean is rrather than the menu appearing she wants the three lines showing at the top right corner and when you click them the menu appears. I believe It already does this on mobile but she wants this to happen on the desktop version. This can be edited in theme builder > header.