Jades don't have "secure element" chips in them. This was a design choice since 90% of all "cracks" of hardware wallets involve disrupting the secure element to gain control.

As a result of no secure element, the way the device encrypts the data on it (your seed) is by using the pin you enter. Obviously a 5 digit pin is a very small keyspace (which would be trivial to crack), so what happens is that pin is itself key-stretched to become a much larger encryption/decryption key off-device by using the website.

So the back-and-forth scanning of QR codes does that, essentially the "secure element" is the website / blind oracle which transforms your 5 digit pin into a proper encryption/decryption key.