Dear Doctor, surgical fixation is usually the treatment of choice for volar displaced intra-articular fractures of the distal radius. If a good reduction has been attempted then it should be casted into some wrist extension.
If it was me then I would be getting a CT scan of the distal radius and carpus to look for intra-articular extension and any compression or loss of volume of the distal radius as this needs to be fixated to allow proper articulation and loading.
Just to be sure I am not an Orthopaedic surgeon and do not know your complete case but from my experience working closely with Upper Limb Surgeons these are the things I would be double checking.
If all goes well and fracture has united in good radiocarpal joint orientation etc and your surgeon is happy to commence physiotherapy and gentle loading then you want to regain full ROM of the wrist and fingers in all directions with normalisation of grip strength over time.
I would also monitor your neuropraxia for gradual return.
Hope this helps.
Cheers
Luke