That’s not what nativization does. Nativization is purely a build-level performance boost.
I’m not exactly sure what you want. Is this your own component class or one built into the engine? In the details panel for the component, near the top, there is a checkbox that says “Editable when inherited”.
I think you may be trying to access a variable or function that is private to a standard component. There’s no way around that in blueprints. Private is private. If it’s just a protected item then you can use C++ to derive a class from that one and make access functions. But make sure there isn’t already an access function. Many internal variables have associated “get” functions. Fewer have “set” functions.
Maybe be specific about what you’re trying to do.