I wouldn’t trust any vehicle to be safe for wading unless it was explicitly designed from the outset for that purpose. There are offroad vehicles with snorkels, and double seals around everything like doors, electronics & batteries which are designed to go through deep water.
The cyberturd… not so much regardless of the lies Elon used to sell it. I would not be surprised if there is small print in the warranty which basically tells people to take a hike if they attempt to use it in the ways Elon has described.