Would communism have largely withered as a result of a White victory? Would there still be a communist uprising in China and an attempted one in Spain? What would the butterflies be for it in such a scenario?
you are mixing up 2 things communism and socialism.
due to the red victory it pushed a lot of socialism to communist habits.
with no red victory, the other socialist strains might stay much more mainstream & democratic.
there would still be socialist uprisings, but their political configuration & habits might differ from otl