AFAIK, LG also doesn't manufacture in China. It used to manufacture in SK until last year, then it moved production to Vietnam.
But yes, LG did move South Korean production to Vietnam. Aside from these countries, LG also produces in Brazil and India: https://www.reuters.com/article/us-lg-elec-mobile/lg-electro...
However, Samsung represents approximately a third of the world's smartphone market, while LG is something like 3% -- tagging along behind Samsung, Huawei, Apple, Xiaomi, and Oppo.