No, we'd call that propaganda as well. It's not that "everything Russian is propaganda" it's that under the Soviet Union at the time these were produced there

No, we'd call that propaganda as well. It's not that "everything Russian is propaganda" it's that under the Soviet Union at the time these were produced there was a specific agenda and ideology intended to be propagated by the state and funded by it. And under that regime, if you made a holiday postcard showing a drunk Lenin and Stalin arm in arm staggering down a snowy street and tried to distribute it as "art" you would have likely ended up in a re-education facility. Context is relevant to the terminology here.