Controlling percentages can change, as can state restrictions on a number of conditions.
As I said it's not something I've dug into the details of.
The largest lithium mining company in the region is Sigma Lithium..
Tesla was negotiating to buy the Sigma Lithium but now the Chinese BYD is the favorite.. [0] [1]
China companies are currently owning the EV market in Brazil , and many other developing contries, and they have plans for both cars and batteries factories in Brazil, but they need access to lithium for that and so they are going for the lithium mining companies as well..
Musk not only need the lithium but he also want to block the grow of Chinese companies that are owning the market in many developing countries where Tesla is not present and are even growing fast in Europe..
Musk expect that a right wing government will align with him, and be in favor of blocking China and that would open the door for him to buy the mining companies instead..
[0] https://www.reuters.com/technology/tesla-considering-bid-sig...
[1] https://www.ft.com/content/3c55d69b-6932-4255-ad79-daeced372...
Things in Brazil are not simple as that. Bolsonaro, the latest right wing president, did more business with china and russia than expected. He was one of the first chief of state to fly to Moscou when Russia invade Ukraine, to reinsure brazil would be neutral on this war. (same position of Lula).
But it’s not just Putin who is guilty. The U.S. and the E.U. are also guilty. What was the reason for the Ukraine invasion? NATO? Then the U.S. and Europe should have said: “Ukraine won’t join NATO.” That would have solved the problem.
This doesn't make him stooge or ally of course. More likely it's the toxic side effect from decades of ingesting his movement's own kool-aid as far as geopolitics goes ("The enemy of my enemy can't be half bad", that sort of thing).
There were even multiple letters from the Chinese embassy complaining about stuff he said..
China even blocked buying meat from Brazil for a while with the excuse of mad cow disease..
So regardless of how much business Bolsonaro did with China, he would be more inclined to help Elon in blocking China then the current left wing goverment is..