That’s not a conspiracy theory. It’s been studied and shown true over and over.
https://www.nature.com/articles/s42005-020-0340-4
https://medium.com/@robhat/an-analysis-of-propaganda-bots-on-twitter-7b7ec57256ae
https://headlineusa.com/china-bots-boost-propaganda/
https://www.oii.ox.ac.uk/research/projects/computational-propaganda/