Lol yeah fat lot of good the last "coup" (Bolsonaro) did for US.Sorry, but what a naive thought.
Latin American countries are poor and defenseless. Manipulating and managing them is the easiest thing in the world and the US does it cheaply and without any competition.
If China wants to protect itself from the US threat to its business in the region, it will need to help its allies to prosper, competing with the US for the power. Otherwise, Latin America will always be poor, cheap and the backyard of the USA that will remain safe and without any threat in sight. While the USA will grow increasingly aggressive and expands its vassals in Asia threatening China's security with impunity.
China will always play moves back. We have a foot in on the region where in the past there was no footholds at all, and now we will move towards having more and more inroads. All the while, countries are being flipped in regions which actually have future potential, like the Middle East, without US being able to do a thing about it.