I think the “floating” floor would be considered common property and it is up to the Owners Corp to fix it and then claim any excess payments from the bareless neighbour who caused the damage.
I’ve never heard of a floor being considered “contents” and even if it wasn’t strictly common property, it would be covered by OC insurance as a permanent fixture (unless there was a by-law in place to say otherwise).
Claim against the OC and then they can claim against the neighbour, if need be.