I listen to probably a majority of communist songs though I really like Lyubeh (related to the soviet union but not communist), IU, Gfriend, TWICE, (don’t fucking judge me) miscellaneous klezmer bands, recently teresa teng, as well as various video game osts. (persona 4. yokai watch, etc.)
Russian rap seems interesting, as mentioned earlier I’m more of a lyubeh enjoyer, though the Russian rap in arbyter froyen is pretty slapper (I didn’t mention Daniel Khan though because his music is still leftist)