Did they not do LPP in Russia?
No, from my research it seems that low-fade stock was not available until after the collapse of the Soviet Union in 1991 and that existing Russian film manufacturers at the time used obsolete equipment when making colour film.
I think that the issue was that Western products could not be imported easily or at all during the Soviet era. Once Eastman was available, local companies like Svema (a.k.a. Cbema) lost traction and went out of business.