The Layout Builder has 2 predefined headers that you can use with the option of turning them off and laying out your own header in the Builder.
Navagation gives you the choice of Menu, Menu Type (Mega Menu | Mega Menu and Off Canvas | and Off Canvas), Dropdown Width for Mega, and Animation. The Off Canvas Menu can be set to the right or left screen position.
Typography can be customized with the complete Font Family, Size, Weight, Style, and Subset for the Body, Headings(1-6), Navigation, and Custom to set and choose Custom Selectors. Google Fonts also.