I created a pod which has relationship field and is related to another pod. Input type is List view (with reordering), allow add new is selected. I added form, enabled this pod, but I cannot see "Add button". It is present in backend but under related I only can choose multiple already stored related pods.

It works fine in backend. Under the related pod I see extra button "Add", which can add multiple related items. Why does the button not show in frontend as well?