Cannot hide the hamburger menu on desktop breakpoint

Hello Everyone,

I just trying to modify a template I used before.
I try to show the hamburger menu only on tablet and mobile breakpoint but I can’t hide it on the base breakpoint.
Sorry, I can’t share the current project because of my client NDA…
So I shared my previous template site instead.

Thank you for helping!

Here is my previous template site, Read-Only:
(how to share your site Read-Only link)

I solve it, thank you.

Care to share the solution please?