https://pbs.twimg.com/media/FemF_adUoAAgbAF?format=jpg&name=...
People are easily influenced by messaging. Today it is easy to create targeted messaging. A state actor could send messages to Republicans that are different than the ones sent to Democrats. In this way it is correct that the actor has no partisan bent. They just want to sow confusion, doubt, misinformation.
One can imagine that it is possible to influence an election without using election specific issues. If, for instance, welfare reform is not an issue in an election but talking about it in a way to create fear and anger can influence an electorate’s desires. I believe that if the CCP is actively engaged in an information war against Americans that they could do so in ways that, on the surface, would appear to be ineffective.
In any case, you can easily find the accounts by searching for the tweeted texts. It's very unlikely that these are regular Twitter accounts. But I see little reason to think this is part of a camouflaged "CCP propaganda operation" to influence the US election. You need to at least make an attempt to masquerade as a "fellow American" to qualify as election interference, but many of these accounts have handles/names that are literally pinyin, or have Chinese profile pics, or regularly retweet/like tweets in Chinese.
It's also not clear to me just what claim the report is making. It says Spamouflage "is already pivoting to focus on [the election]". Then later it says "the bulk of the content appears aimed at creating a sense of dismay over the state of America without any clear partisan bent... These [the issues focused on] are not election-specific narratives and have been a significant feature of Spamouflage's content over several years." So Spamouflage is at once pivoting to focus on the election and mostly talking about issues that aren't election-specific; and it's at once trying to improperly influence the election outcome and doing so in a way 'without any clear partisan bent'...