Unitys Prefab Equivalent in Unreal or similar or how do I make some specific kind of object?

Nah, not exactly. It isn’t the logic alone. Furthermore I want to see and alter the visuals like the button placement (which are also actors).

As I’ve alread said, your solution with child actors works nicely for now. The only thing left is the improper naming and that the public variables of the child actor are not accessible in the editor.