Open Source Hardware Wallets:
SeedSigner
Foundation Passport
Trezor
Bitbox
Only one of these, SeedSigner, you can build yourself without anyone knowing the purpose of your use is Bitcoin.
All the rest including the non-open source Coldcard requires you to trust the manufacturer & the supply chain till it reaches you.
What about Blockstream Jade? Is it NOT open source?
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It is, I forgot to add it ❤️