You may lose out on the Federal tax credit - the foreign-made EV exclusion apparently takes effect the day the bill is signed. Pay close attention to the news. If you have a "signed contract" you may be grandfathered in, but it isn't at all clear if a reservation meets the definition of a signed contract. If VW gets their act together this week, they might have you sign a contract this week, which would solidify your position.
Treasury/IRS may amend things when they write the actual rules, but it is all very fluid right now. Sorry to be the bearer of possible bad news, but it seems like a heads-up is in order.
I have not seen the latest changes, but I had read that the new bill would not take effect until 2023, and that it had nothing to do in changing the current configuration of the rebates that would then sunset at the end of this year.