Raycast a vertex uv from a OBJLoader data type

Good Day
I am trying to detect and visibly mark a spot of a loaded objFile.

One of the examples I followed from the documentation
three.js examples

Following examples, in the documentation and other sites, I can change the colors in a mesh of an obj using Raycaster. But what I want to achieve is to have the mouse hover over the obj and used Raycaster to detect a specific vertex (uv), not the whole mesh.
How can I go about this?

The main reason why I am trying to create this is that I’ve run into the problem that some models are created using only one mesh, causing the whole mode to change when the mouse hovers over it.

An Image for context