Rooshishe Yidden.
Russia is very big. It had Ashkenazic Jews, constituting the vast majority of Russian Jews, as well as Sephardic Jews in different regions. The Ashkenazim were generally in the European part of Russia whereas the Sephardim mostly lived in the Asian parts of Russia.
Khazar Jews were a tiny number of royal family members a thousand years ago that lasted a small time before they melted into other groups of Jews and haven’t existed as entity for nearly a millennia.