First I've seen that explicitly mentioned. There are proposals and permutations which include additional incentives for US made / union made aspects. but the base 7500 is maintained, irrespective of where it's manufactured.
A proposed larger $12,500 tax credit to incentivize consumers to purchase an EV has stringent limitations that disqualifies most EVs sold in the U.S.
www.forbes.com
[EDIT] NM I see it here in the Forbes article, good catch!
11. Chinese made EVs would be ineligible for the tax credit.
Senator John Cornyn, the Republican Senator from Texas, introduced
an amendment (p. 55) that excluded Chinese produced EVs from the tax credit. In a rare move of bipartisanship, this amendment was
passed unanimously.