Copy components from one file to another

Hey guys,
I’m using Eva design system for a project. There are two figma file, LIGHT and DARK. I importeed them both. So when I copy/paste a components from the DARK design system, the main components gets copied into my file, just the way I want it, so I create my own component set. BUT, if I copy a components from the LIGHT design system, only a components instance gets copied, instead of the main components, so if I wanna edit it, I have to edit it in the LIGHT design system, as opposed to editing it in my local file, the way I would want it and the way I would expect it.

Why is there a difference when copying a components from the LIGHT system vs the DARK system? How can I copy the main components instead of an instance into my file?

Thank you so much