The Russians were effectively out of range from German cities for a long time, since they had very few strategic bombers, preferring two engine bombers instead; those strategic bombers they did have mostly targeted cities around the Baltic, aiming for railway junctures, airports, and the like.

I don't think they ever did enough damage to be meaningful, though: the Russian strategic bombing regiment dropped 144,750 kilograms of ordinance total during 1941 (before losses basically grounded them,) while the US dropped 1,510,463 kilograms of bombs in a single raid on Toyko in 1945.

Unsurprisingly, when the Soviets decided they DID need something bombed, they would ask the Western Allies to do so, though this was generally rare.