Many wonder how much of The Great is true, as the Hulu original series detailing Catherine the Great’s rise to power often feels almost too bombastic to be taken from real life. The Great never claims to be 100% accurate, describing itself as an “occasionally” true story. However, many have difficulty differentiating between fact and fiction. The show put a unique spin on Catherine the Great’s life, adding many fictionalized elements or sensationalizing true events to such an extent that the level of historical accuracy in The Great is low though it’s not absent.
https://screenrant.com/the-great-hulu-things-series-historically-correct/