Indian Ocean currents suggest those parts would most likely have drifted to that Island after a crash along a route generally toward that part of Africa.
Oddly, though, there is a current from western Australian waters that goes north and would intersect the current toward Africa, so that possibility isn’t ruled out.
Seems much more likely, though, that the plane would have been going in the general direction of southeast Africa. Then the current would have been almost direct to Reunion island of Madagascar.
Expert on FOX said current go in circular motion and finding it here would be consistent with that