I guess my intent was not to point out that it has a mechanical key, rather that the description of the key on the webpage was wrong (it is not hinged).

The mechanical key fallback pattern is standard across the industry for sure.

It's entirely possible that the BYD key they scanned and the BYD key you possess are of different designs.

Ah, I misread your earlier revision's enthusiasm at the end as being about the mechanical key, not the CT scan.