The support by local governments is a major factor for the EV boom (along with other booms like renewables).
The mixture of federal, regional, and local support is a fairly critical part of the Chinese development model.
(Technically there's no federal government, period. There's just the bureaucracy and the party. The party's leadership determines policy, the bureaucracy carries it out. Local decisionmaking exists when micromanagement reaches its limits, and ultimately it is a system of gap-filling. Or, in a sense, it's a system that the 9th and 10th Amendments of the US Constitution anticipated and therefore needed to be addressed, 200 years early)
Yes there de facto is, especially due to the post-Mao reforms.
If you want to dig into how Chinese federalism works, I'd recommend these sources [0][1]
[0] - https://cjil.uchicago.edu/print-archive/cooperative-federali...
[1] - https://mitpress.mit.edu/9780262534246/how-reform-worked-in-...
Given that most of these governments are now in a pinch with this debt, it remains to be seen if this was a good idea.