Nobody knows this information, because Wasabi won't tell.

The blockchain analysis company they are funding was even kept a secret, before they were exposed that it was Coinfirm, and yet Wasabi still claims to be the ultimate privacy solution, when they are clearly working with a pro-censorship service to spy on people's UTXO.

Even if Wasabi and zkSNACKS publish the criteria for blacklisting certain UTXO, it will not change the fact that they can blacklist any UTXO for any reason they decide at all, and surely they are storing and sharing data with a blockchain analysis firm, if not how then will they spy on their customers.