There can be options, the OpenDime[0] is one that’s intriguing. The owner seeds the entropy before it can be used and the only way to get the private key is to physically (and visibly) alter it.
I also like how they say "no trust", but in reality, you have to trust them (and their entire supply chain).
Edit: from their FAQ: "Can I re-seal after breaking the seal? No. A permanent change is made inside the flash memory of the processor." Oof. Big oof.