There have not been many Russian Doll season 3 updates, but there is a good reason to think there will be a third season coming to Netflix. After Netflix released Russian Doll season 1 in 2019, it was a long wait for the follow-up. Russian Doll season 2 arrived three years after season 1 because of filming delays related to the pandemic, but that helped justify the four-year time jump. With that said, the idea of a third season came up thanks to star Natasha Lyonne, but with her working on the new show Poker Face, it's unclear if there will be time to make Russian Doll season 3.
https://screenrant.com/russian-doll-season-2-updates-story-release-news/