Remember every time we find Putin backed propaganda outside of Russia in the wild, it's nearly always boosting predominantly conservative viewpoints versus anything else.
Outside of their borders they're more interested in people fighting with each other than anything like coming together. Right wing politics is how they do that
Primary sources tend to disagree
Here's a study from 2019 about it that backs up my assertion that more is conservative https://academic.oup.com/joc/article/69/2/168/5425470
And of that propaganda being created, that conservative inclined people are most likely to fall for it: https://journals.sagepub.com/doi/full/10.1177/20563051231220330
There seem to be plenty of other papers that more or less reach those same conclusions with a good number of citations, but I can't find anything really at all on Google Scholar concluding the opposite with a quick search, let alone something also credible.
The closest some papers come is saying that they try groups all over the political spectrum, as their goal is disunity ultimately, but they seemingly don't really have any kind of continued success with misinforming those groups anywhere near as effectively. They more or less all end up concluding that most of the propaganda targets conservatives, because they're the ones that fall for it.