Leaflet Tree Control Layer (sidebar)

[Ariana]

Hello, 

I'm looking for examples of code structure to create an interactive map with Leaflet.control.Layer.Tree
I'm having a hard time finding clear code, I've looked at the Github examples and consulted Chat GPT, but as I'm a novice I'd like an example with a clear explanation of the structuring.

Do you have any examples? It's for a map including multiple geographical points, layers and sub-categories of layers, with text pop-ups.

I want create a tree structure sidebar.

Without Json or else, just a simple code. 

Thanks for your help!