Currently, if you incorporate a component of the tree view control into a tab in a form, save it, and publish it, you will not be able to delete the tab or delete the component.

It has been confirmed that the reason why it is not possible to delete tree view control is that it is a field that is required at the system level, so it cannot be deleted.

At this time, once you add it, you can never delete it again.

Therefore, when adding a tree view control to a form in the future, I would like you to display a message that says "Once added, deletion is not possible".