How to make selectable my custom node in editor?

Help Programming
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1

Godot Version

4.4

Question

I created a custom node.
It extends StaticBody3D, uses @tool, and contains a CollisionShape3D as well as a few custom nodes that extend MeshInstance3D.
However, I can’t click or select the nodes in the editor.
How can I make them selectable?

2

Right click >> editable children?

3

I want to select the parent, not the children.