Whether thanks to help from expeditionary forces from America, Japan, etc or whatever means, Lenin dies, whatever- The Whites instead of the Reds win the Russian Revolution sometime around 1918-19. Does the new "democratic" Russia go on to conquer Central Asia, Caucasus, White Russia, and Ukraine (Little Russia/Ruthenia)? Does a democratic Russia possibly go fascist and take Ukraine, White Russia, and the Baltics, along with half of Poland in a deal with Hitler? Would Hitler view the Russians as less than a threat and not deal like he did with Stalin, or would he view them like Bulgaria, Hungary, or Italy; nice to have as lesser allies as long as they obeyed his overall aims.
Can we see independent nations like Tuva, Ukraine, White Russia (Belarus), Bukhara (technically always independent emirate, but a Russian protectorate from the 1700s), Kokand, and Kazakhstan. If we see independent nations east of the Urals (except sparsely populated Siberia and along the Trans-Siberian RR easily goes Russian) then could we see a China that doesn't take back Xinjiang in the 1930s thanks to pan-Turkic policies of these Central Asian states, we could then go on to butterfly away the PRC since there would be no support from a non-existent USSR, and even butterfly away the 1951-1959 conquest of Tibet by China allowing Tibet to be independent.