So here is an interesting idea....the VAR official tells the ref he had made an error and should come and review. The ref ignores. No one knows, as you say. Except if the VAR bloke reveals what he advised to the ref and refuses to be silenced in the face of the furore, by going public, because to the the clear incredulity of it to the rest of the football world the VAR official is guilty here too.. Ends his career no doubt, but Sporting Integrity and all that......!