Every single left wing party in ukraine was banned, and my friends in the country were arrested for being socialists. Speech in the country can not be considered free and opinion can not be measured accurately at the current moment in time. It would also be sort of foolish to attempt this with the country split into 4 regions between Ukraine proper, Crimea and the two Donbas republics. Ideally you would include all of them in that data, and if we went back in time and looked pre-2014 (when the civil war started) we'd see a lot of support in those regions. But now? Everything is a mess and I wouldn't trust either states at war to give us reliable data.
I of course don't consider the factions pursuing a restoration of the Russian empire to have anything to do with socialism either. For the record.