The Russian Presidential Aide and head of the Russian negotiating group with Ukraine also said that recently the Russian Military Historical Society handed over several thousand books to the institutions where Ukrainian prisoners of war are being held, including textbooks on the history of Russia in the 20th century and pamphlets about Bandera
During the 2022 offensive Ukraine themselves claimed KIA:PoW ratio something like 21 to 1. For comparison, even the most brutal fighting on Okinawa which is infamous for Japanese not surrendering and US not taking prisoners had that ratio around 14 to 1. So by their own admission Ukraine was either not taking prisoners or killing surrendering soldiers.