Thanks for all the info. I would imagine most btc NFC wallets run a similar pattern as you guys? Curious if you know any (you dont have to mention by name if you dont want) that are currently available out there that dont use encryption, and would be vulnerable to tools such a flipper?
That is completely implementation-specific. We will probably never know about the wallets that are closed-source (unless someone does some reverse engineering research on them).
You could have a look at Coinkite's implementation for instance, though:
https://github.com/Coldcard/firmware