Other manufacturers may build/have build and sold cars like this example selling a 2020 in Sep, or Oct or Nov before the 1 Jan calendar year change. But Tesla does not do that.
Here's an example. If you ordered a new Tesla in Nov or Dec and they are building it, they will assign a VIN for that calendar year. But if the actually build does not occur in Nov or Dec, and will be built in Jan or later, they will change your VIN 10th character to indicate the calendar year for Jan or later. And some owners have reported a complete VIN update or replacement, because Tesla assigned a different car that was built or being built earlier, so the complete VIN was different because it was a different car.
Why suddenly would your be different from what they have been doing for hundreds of thousands of cars for the last 7 years?