This is a frequently asked question of Xhorse keys. People say that no one can do Autel ikey and Xhorse either.
Here is the clue.
You can generate a xhorse proximity with 902Mhz profile (image below).
It works, just generation and test frequency.
People have made a lot of these on the Xhorse universal proximity type.
The remote worked, lock, unlock works.
The remote start worked. But to starts the vehicle, only when the key in the slot.
The proximity function won’t work.