add additional css classnames to menu anchor

function add_additional_class_on_a($classes, $item, $args)
{
	if (isset($args->menu_anchor_class)) {
		$classes['class'] = $args->menu_anchor_class;
	}
	return $classes;
}
add_filter('nav_menu_link_attributes', 'add_additional_class_on_a', 1, 3);


wp_nav_menu(array(
	'menu' => 'Main Menu',
	'container' => '',
	'menu_class' => 'navbar-nav me-auto mb-2 mb-lg-0',
	'menu_anchor_class' => 'nav-link', // add css classnames here
));