I think you may be something else incorrect, but I can’t tell what it is from what you’ve provided.
When using this
add_filter('wp_nav_menu_items', 'my_wp_nav_menu_items', 10, 2);
function my_wp_nav_menu_items( $items, $args ) {
...
$args->menu should be a term object. When I add this filter and do print_r($args) I get this:
stdClass Object
(
[menu] => WP_Term Object
(
[term_id] => 30
[name] => manue 1
[slug] => manue-1
[term_group] => 0
[term_taxonomy_id] => 30
[taxonomy] => nav_menu
[description] =>
[parent] => 0
[count] => 7
[filter] => raw
)
[container] => div
[container_class] =>
[container_id] =>
[menu_class] => nav-menu
[menu_id] => primary-menu
[echo] => 1
[fallback_cb] => wp_page_menu
[before] =>
[after] =>
[link_before] =>
[link_after] =>
[items_wrap] => <ul id="%1$s" class="%2$s">%3$s</ul>
[item_spacing] => preserve
[depth] => 0
[walker] =>
[theme_location] => primary
)
Looking at this https://www.advancedcustomfields.com/resources/adding-fields-menu-items/
add_filter('wp_nav_menu_objects', 'my_wp_nav_menu_objects', 10, 2);
function my_wp_nav_menu_objects( $items, $args ) {
...
$args results in the same.
Probably a little known fact, but $post_id when calling ACF functions can also be an object of type post, term or user.
