Yeah they do. The fact that the company structure is deliberately set up to hide who owns what is one of the main impediments to carrying out the sentence.
They can't take something that belongs to a shell corp that he's not listed as the sole owner of until they prove that he de facto is, and a lot of it is registered in his parents' name for that exact fraudulent purpose.
Have you seen how dumb his shell companies are? Like how he says on air he's shipping his product to his dad's warehouse but that are totally not related companies