Use Heroicon Icons

You can customize a Heroicon icon displayed by invoking the icon method when defining the menu:

use NormanHuth\NovaMenu\MenuSection;
use NormanHuth\NovaMenu\MenuGroup;
use NormanHuth\NovaMenu\MenuItem;
use NormanHuth\NovaMenu\MenuDisclosure;
 
MenuSection::make(__('Customers'), [])
    ->icon('chart-bar'),
MenuGroup::make(__('Licensing'), [])
    ->icon('chart-bar'),
MenuItem::resource(User::class)
    ->icon('chart-bar'),
MenuDisclosure::make(__('Licensing'), [])
    ->icon('chart-bar'),