Add theme suggestion to a node depending on the menu it belongs to

Question

I have a mega menu that displays child menu items when you click on a parent menu item in form of a drop-down menu. The thing is that, this menu, also displays cards as nodes and I want to add a theme suggestion only to this card nodes that are inside the menu drop-down.

I can get the node with a simple MYTHEME_theme_suggestions_node_alter() hook but I don't know how to get the menu item of it.

I've tried menu_ui_get_menu_link_defaults($node) as seen in this question but it always returns 'main', which is correct but, also almost every node on the page apart from the drop-down menu node seems to come from it and, therefore, that's not what I want.

All I need is an exclusive theme suggestion for this nodes represented on the mega menu drop-down

Answer 1

Adding a new view mode just for this types of nodes that are rendered on the menu, is the best approach, specially if this nodes are just from one bundle like 'page'.