I think in some countries car values can be influenced more by model year than actual date of first registration .
And is the uk unique in values being affected by whether the car is registered in 2021 on a 70 plate, 21 plate, or 71 plate, or in 2022 on a 71 plate,22 plate or 72 plate?
A friend in Bulgaria was buying a used car advertised as 2011. He discovered at the last moment it was registered in December 2010. The Bulgarian dealer saw nothing wrong with this as it was a 2011 model. Actually the price was about right for a 2010 car, and a bit too good to be true for 2011. So with some more negotiation the sale went ahead.