I think you totally change the context of seizing ChipMixer. Like the way you said LE stole your money. Instead CM was seized because it was involved in illegal activities like money laundering.  And regarding to your money, i can say maybe if you find a way to prove your assets as legal ones and prove them that it was not involved in money laundering, like i am not a financial expert or lawyer but i think if you successfully prove them that your money was totally legit and you paid taxes then something could be done.

But this is so unlikely to be happen because btc is the first danger to those LE's banking systems. So why would they help you in getting your money back. I can say, remaining off the radar might save you bucks because i do not think mixer got any mechanism to prove from where those transactions are coming like the exact one and involvement of you could cause your more harm. (Just a tip nothing more).