The same reason why most other EVs are unobtainable - the production line is maxed out and orders are closed through 2023. There's loads of second hand ones for sale that I can see online, and personally I got mine through a lease deal - signed paperwork, got the car delivered 3 days later. If I wanted to order one I'd probably wait a year.

I believe most of those are so-called compliance cars, cars designed to mainly satisfy imposed legal requirements, such as weighted average of CO2 emissions for a brand.

Sure, but they only fulfil that purpose if they sell loads. Just it existing does nothing for manufacturer's averages. They need to sell one of these for every 200g CO2/km car to average 100g CO2/km overall.

Probably sold out due to being popular hah.