Indeed. Many historians cite the opening of another front in the Pacific theater by the Soviets as the primary cause for the Japanese surrender (although this is a hotly debated issue).
China is often hardly mentioned at all in narratives on WWII as a whole or in the Pacific.
It’s always mentioned in the context of Japanese aggression, e.g., the “Rape of Nanking”.
I agree, China is always mentioned in the context of the Japanese invasion of China...