It won't be called OPCF (ontario policy change form). I'm not sure what they call it in QC. Look for "waiver of depreciation" en francais
If you do have that coverage, if the car was a write off, you'll get a brand new one (as opposed to a few month old used car, or monetary settlement relative to that).
I'm very glad nobody was hurt, injury coverage on QC policies is nothing compared to ON. However, if you did sustain any late developing injuries, you will make the claim under your own Ontario auto policy.