This is a step by step guide for creating a header menu button option.
You can see the example of the menu button from the :
Button menu items are only available in top classic header with style set to none.
Open your website in site setting mode and navigate to header >> header layout
Choose “top” from the header position option.
Choose “classic” from the style option and choose “none” from the type option
Open Wordpress dashboard and From the left-hand sidebar, navigate to Appearance >> Menus
Select the menu which you want to use ( it should be selected as primary menu )
Click on a first-level menu item and choose "turn to button" option and save.
For changing the style of the menu button Open your website in site setting mode and navigate to header >> menu button
Hope that article helped you, if you have any question please visit our help center.