So you think that it's impossible for Jade hardware wallet device to work with Krux firmware somehow?
Yes, it is impossible. Krux main application is written in micropython, it would be really hard, if not impossible, to port it to ESP32 devices such as Jade.
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.
Yes, they are working pretty well on official Jade hardware AFAIK.