Copied from another forum. The IRS has updated form 8936 and a draft instructions to mention the transition rule:
2023 Form 8936
Draft 2022 Instructions
In the draft, the transition rule is now mentioned!
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Enter 08/15/2022 if you qualify and elect to apply the transition rule discussed below.
Transition rule. If you purchased, or entered into a written binding contract to purchase, a qualified plug-in electric drive motor vehicle after 2021 and before August 16, 2022, you may elect to treat such vehicle as having been placed in service on August 15, 2022, the day before the enactment date of the Inflation Reduction Act of 2022. Any additional election guidance that is issued will be added to these instructions at a later date."