In The Vegetarian, it’s the same set of events, Yeong-hye’s decision to be a vegetarian, but from the perspectives of three close relatives of the protagonist: her husband, her brother-in-law, her sisiter.
It’s only when reading part three, from Yeong-hye’s sister’s perspective—in the third person narrative— that it occured to me that we never heard the story from Young-Hye’s perspective.
William Faulkner’s As I Lay Dying, Virginia Woolf’s To the Lighthouse, Albert Camus’s The Stranger, Kazuo Ishiguro’s The Remains of the Day. These are previous examples of the use of multiple perspectives in novel. Not sure, if they were all in third-person narratives, or multiple first-person narratives. Research.
The third person is not necessarily impersonal.