Syndicalism is pretty much the same as communism. Workers liberation, participation of the proletariat, internationalism and so on. It is not about Soviets/Counsels who are in control, but rather trade unions that are now running the industry. These trade union councils form Syndicates. Syndicalism puts a strong emphasis on being anti-hierarchic (?) and egalitarian.
IIRC the first nations that fell to it were France and Britain, then Georgia, Centroamerica and Bengal. Many other countries are threatened by this ideology, like USA, Brazil and Bolivia.
I think you cannot tell if it is the same Syndicalism as in our time. Like in OTL with communism. Yes, Cuba is communist, but still has another political system as communist North Korea, for example.
For the other ideologies : pretty much the same as in 1914 OTL. The Emperors are still in charge, and democracy is weakened but still alive. Fascism was never "invented", instead of that the Syndies are the "bad boys".