I don't see how you can separate "purchased" from "placed in service" in this case, unless you pay for the car in 2021 and it is delivered in 2022, which would separate the purchase date and in-service date. If the car is available for you to drive in 2021, then it is in service in 2021, at least for you personally.
You can put assets in service for business in a different year than you buy them, but that is not helpful to you here. If you take delivery in 2021, then the car is placed in service at least by you personally. If you then transfer it the the business and place it "in service" as a business asset in 2022, that's actually worse, because your basis for depreciation would be the fair market value of the used vehicle at that time, which will be less than the new purchase price.
You need to not take delivery until 2022, if you want to claim the EV credit on your 2022 tax return. You might be able to order it in 2021 and pre-pay or pay a down payment, and that money does not force you to claim the credit when you pay, but you must claim the credit as of the date you take delivery.
