From what I have read: in 2019 there were only two EV battery plants in the US, as of 2023, there were 34 built or under construction.
I know of 9 EV battery plants in Ontario and Quebec, I believe there are more in the planning stages.
Although China makes most of the EV batteries in the world today, and Australia is the highest current producer, of the lithium neather are the largest lithium deposit countries. That honor goes to Chile.
Prior to the USGS study, countries with the top proven lithium deposits are (in order from highest) Chile, Australia, Argentina, China, USA, Canada.
There are known deposits in Bolivia however development appears to be stalled.
If the USGS study is found to be correct, the USA will be easily double the reserves of Chile.
Interestingly, there are two lithium battery recycling facilities already operating in Canada, one in Ontario, the other (since 2019) in British Columbia.
I know of a Lithium mine near my area in Manitoba, and new mine near that is being developed near-by on the Ontario side.
I also read there is development in Alberta (similar to the LA deposits) that are related to the oil and gas industries. Guess we will see where it all ends up.