Jade has the shape of a M5stickV but uses ESP32 indeed. So how they managed to use camera e scan QR codes? I believe they were able to achieve this by using efficient C code, instead of micropython.
So you think that it's impossible for Jade hardware wallet device to work with Krux firmware somehow?
Jade has support to be compiled and flashed in TTGOs and M5stack Black, Grey, Fire, etc(not k210 M5stickV). I did it myself and it works pretty well. However the firmware for these boards does not have camera support neither air-gapped features, only USB signing on Green Wallet.
Is airgapped features with camera and QR code already working with Jade wallet?
I saw they announced firmware update that will enable that, but I don't have their device to confirm this.