A UTXO ("received coin") you hold requires two basic properties to be KYC free.
1. The coin must not be identified as belonging to you by an outside source at no point in its history (unless sufficiently mixed).
2. The address it occupies, and the addresses it previously occupied, must not have ever been exposed to a public node (potentially a surveillance node).
A surveillance node will receive your xPub (info to derive all 8.6 billion of your addresses), and your IP address...