Ugh. It's really hard. Mining is the first thing that comes to mind, but it's not fast and requires often significant learning to do effectively.
I don't know enough specifics about the BS the NZ is putting their citizens through, but... You can buy KYC BTC and then make it disappear. If might not be "legal" but, as far as I'm concerned, those laws are repugnant and should be ignored.
Do you have a link for an instructional on how to de-KYC some sats? I know someone with an old, compromised HODL who might like it cleaned 😆
Look up coin mixing and creating a cold storage wallet.
I was under the impression coinjoining somehow didn't fully absolve you from the coins? Am I mistaken, is it a clean slate?
It can, if you mix them enough. It requires time and consequently it requires more cost to do so.
Not ideal Lol but an option