Copiare insieme alle note i simboli di accordo. è possibile?
Yes, you just have to make sure the chord symbols are explicitly selected, which they generally aren’t when you select staves by e.g. selecting the top staff and Shift-clicking the bottom staff, because chord symbols are essentially a system-attached item.
If you use the system track though, that selects all items in the system, including system-attached items like chord symbols.