Those are in use.
They are, but once the remaining Dr19 locomotives have been delivered, many will no longer be in use. A Dr19 easily replaces a double traction of Dv12 locomotives, probably a triple traction as well. So, the upcoming 30 new Dr19 locomotives will free something like 50 or 60 Dv12 locomotives. That's a sizeable number! In Ukraine they also have much better facilities for building spare parts and repairing pre-existing parts than we have in Finland. Even if some locomotives have to be used as spare part donors for the rest of the fleet, there will be many Dv12 locomotives that will be completely fit for the service in Ukraine.
But, of course nothing to this effect has been uttered for now. It would be logical for VR to donate more to UZ, especially since that way the locomotives will not end up in the competitors' fleets, but only time will tell what really happens.