This is total fantasy. Russia wants all of Ukraine and even parts of Moldova. Maybe even all of Moldova. And the Baltics. It will go for the Blatics as well. And al the central asian republics and possibly Azerbaijan.Russia is in control , simple to tell it has gone into Ukraine from 3 sides and unopposed
Russia's objective was buffer state and that objective is met , Kiev will be icing on cake and it will be used as a bargin chip to negotiate acceptance of new border with Ukraine's new Head of state
The weapons coming in from Poland won't matter as the war will be over in 2-3 weeks after Russian objectives are met , with Ukraine Surrender and acceptance of Kiev Accords , anticipate Kiev will be returned to Ukraine contol from Russia to close out the deal
This is Russias aim long term. But the way things are going, is also quite likely there will be no more Russia soon.