If you will copy paste the states from prototype and paste, its wiring also get copy.
But in XD we dont have such feature to copy only wiring. Please raise a feature for it, so that we will pick it earliest.
Help let me know if you have any further query.
As suggested by Vertika to submit a feature request. I would suggest submitting your feedback here: https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests
This is the best way of communicating with our engineering team so that they can look into your request.
Hope it helps.