How to define children of the Object3D as vue data elements

I’m new to vue so excuse me if this is a silly question.

I have a Object3D with nested meshes, that are created dynamically.
I want to use define these nested meshes as vue data elements, so that I can easily style the meshes, individually based on some condition.
Currently, the meshes are rendered because they are children of the Object3D, but I don’t see them as HTML elements.
So how can I define them in vue?