I have some questions, not a tech-savvy person, just curious.

What part of Microchip ATECC608A is open source? As far as I know, Microchip has stopped publishing datasheets for their microchips after ATECC508A version, further versions are all NDA. Can I trust these secure elements if data is no longer available for everyone to see and check? How can I be sure that governments haven't forced Microchip to implement some backdoors to steal my crypto?

Found an old topic from Trezor explaining the reasons why they don't use secure elements https://blog.trezor.io/is-banking-grade-security-good-enough-for-your-bitcoins-284065561e9b