WP Reverse Post Navigation

WP_reverse_post_navigation

//found this somewhere on the internet. Reverses the navigation.

//works well with the Post Type Order navigation here https://wordpress.org/plugins/simple-custom-post-order/
//shows the prev and next post in reverse which helps when ordering posts not by date

function the_reverse_post_navigation( $args = array() ) {
	$args = wp_parse_args( $args, array(
		'prev_text'          => '%title',
		'next_text'          => '%title',
		'in_same_term'       => false,
		'excluded_terms'     => '',
		'taxonomy' => 'category',
		'screen_reader_text' => __( 'Post navigation' ),
	) );

	$navigation = '';

	$previous = get_next_post_link(
		'<div class="nav-previous">%link</div>',
		$args['prev_text'],
		$args['in_same_term'],
		$args['excluded_terms'],
		$args['taxonomy']
	);

	$next = get_previous_post_link(
		'<div class="nav-next">%link</div>',
		$args['next_text'],
		$args['in_same_term'],
		$args['excluded_terms'],
		$args['taxonomy']
	);

	// Only add markup if there's somewhere to navigate to.
	if ( $previous || $next ) {
		$navigation = _navigation_markup( $previous . $next, 'post-navigation', $args['screen_reader_text'] );
	}

	echo $navigation;
}


//how to use
the_reverse_post_navigation( array(
					'prev_text' =>  __( 'Previous Post', 'ignitionpress' ),
					'next_text' => __( 'Up Next', 'ignitionpress' ),
				) );

You may also want to set your query (front end) to use:
orderby = menu_order
order = ASC