Once the BTC leaves an exchange, it's anyone's guess where they went.

I can "withdraw" to ANY wallet, technically a withdrawal could be a "send". It's absolutely impossible to know, for certain, where it went.

Wallets aren't KYC.

Nobody has been able to give me a decent answer here.

KYC SATs are not a thing. If SATs can be blacklisted, that's a different beast.