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Or in small pieces on the seafloor.
Remember this was a construction about the size of a school bus yet needs to be light enough to be lifted by a weather balloon, so it could afford be quite fragile. Thus when it hits the ocean surface much of it would break up & if the parts were not sufficiently buoyant they would sink to the bottom, which could be between 200 to 2000 meters down.
I bet the equipment that was hung underneath is now at some government facility being analyzed and we will never see it.