You need to learn more about these countries then. Don't just buy the propaganda.

One of the ways Marxist-Leninism splits from traditional Marxism is Lenin believed (or realized that) a communist state would need to go through a transitionary market period with strong regulations and planning. The USSR never abolished money. That is way way way farther then they managed to get. There were super markets (not great but I Western standards, but they were there). They believed an ideal socialist state would take a long time to achieve.

Here's a link about shopping and money in the USSR: https://www.google.com/amp/s/amp.reddit.com/r/AskHistorians/...

China is basically the same story, but the market was even stronger.