Short answers, pulled from the story.
According to the 2021 Russian census, 884,007 people identified as ethnically Ukrainian in Russia, representing about 0.6% of the total population. This is a sharp decline from the 1926 peak of nearly 6.9 million, when Ukrainians made up 7.41% of Russia's population.
The Eastern Diaspora refers to Ukrainians living in the former Soviet republics, a term that came into use in 1992 to distinguish them from the Western diaspora abroad. It is estimated to number approximately 6.8 million people, compared with roughly 5 million in the Western diaspora.
Ukrainian clergy were dominant in the Russian Orthodox Church during this period. Seventy of 127 bishops were recent emigres from Kyiv, Ukrainian Stefan Yavorsky became Metropolitan of Moscow, and graduates of the Kyiv-Mohyla Collegium had opened over 125 schools and seminaries across Russia by 1750.
These are the informal names for historic Ukrainian settlement zones in Russia. Green Ukraine, or Zeleny Klyn, covers over one million square kilometers in the Far East near the Amur River. Grey Ukraine, or Siry Klyn, developed around Omsk in western Siberia. Yellow Ukraine, or Zholty Klyn, was founded on the middle and lower Volga around Saratov.
From 2014 onward, Ukrainian activists and organisations faced prosecution in Russia on political grounds. Notable cases included the trial of filmmaker Oleg Sentsov, the closure of a Ukrainian library in Moscow, and the banning of the Ukrainian World Congress. By November 2017, over 427,000 asylum-seekers from Ukraine were registered in Russia.
On the 22nd of January 2024, Zelenskyy signed a presidential decree titled "On areas of the Russian Federation historically populated by Ukrainians". It directed the Ukrainian government to preserve the national identity of Ukrainians in Russia and to counter misinformation about their history and present situation.