THE SAME NUMBER OF SOYBEANS ARE GETTING CONSUMED.
If China is buying South American soybeans instead of US soybeans than whoever was buying from South America is going to buy from the US because it's not like 8 million tons of soybeans per month are magically getting created in Brazil.
It's not that there will be no market effect but it's pretty close to a zero sum game because the global production and consumption of soy really isn't changing that much.