If zkSNACKs hasn't allowed outside firms to organise independent audits of their operations they should. It'll be good if Wasabi Wallet users seek reassurances. I don't know if Unijoin plagiarised Wasabi's
legal documents or if Unijoin's functions didn't copy the open source and non-custodial aspects in full. I didn't read posts with those allegations before you've said it.
Of course you don't know what these dodgy centralized mixers are doing because all the shills in this forum would like to keep you ignorant so they can continue profiting off them.
There is no trust in zkSNACKs required. Tor is on by default, it's not opt-in like Samourai or Sparrow. They don't collect your xpub like Samourai or Sparrow's "trusted" electrum servers. Block data is downloaded on your device so you don't have to make an API call to blockchain.info like Samourai did to get your balance. Wasabi is non-custodial so there is no way for the coordinator to link mixed outputs to registered inputs, that's what Unijoin does.